Answer:
Step-by-step explanation:
rise is up and run is over.
The first number would be y and the second number would be x
and x is run
y is rise.
The issues surrounding the levels and structure of executive compensation have gained added prominence in the wake of the financial crisis that erupted in the fall of 2008. Based on the 2006 compensation data obtained from the Securities and Exchange Commission (SEC) website, it was determined that the mean and the standard deviation of compensation for the 524 highest paid CEOs in publicly traded U. S. Companies are $10. 82 million and $10. 25 million, respectively. An analyst randomly chooses 46 CEO compensations from 2006 for analysis. Calculate the expected value of the sample mean. The sample mean is ______________ million dollars
Based on the information provided in the question, The expected value of the sample mean is approximately 497.92 million dollars.
To calculate the expected value of the sample mean, first calculate the mean of the population ($10.82 million) and then multiply it by the sample size (46).
Mean of Population * Sample Size = Expected Value of Sample Mean
$10.82 million * 46 = $497.92 million
Expected Value of Sample Mean = $497.92 million
A sample mean is a statistical measurement that shows the mean value of the data in a sample. It is determined by summing all of the values in the sample and dividing the total by the number of observations.
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25 Cards are drawn from a standard deck of 52 cards, what is the
probability of getting 2 kings?
The probability of getting 2 kings out of 25 cards is approximately 0.044 or 4.4%.
Drawing cards from a standard deck of 52 cards is a random process, and the probability of getting 2 kings out of 25 cards depends on the total number of possible outcomes.
There are 4 kings in a deck of 52 cards,
So, The probability of drawing a king on the first draw = 4/52.
Since the deck is not replaced,
The probability of drawing another king on the second draw = 3/51.
Therefore,
The probability of getting 2 kings out of 25 cards can be calculated by combining these two probabilities.
The probability of drawing 2 kings = [tex](4/52) * (3/51) * (25C2)[/tex]
Where,
25C2 = The number of ways to select 2 cards out of 25.
After calculating this expression, the probability of getting 2 kings out of 25 cards is approximately 0.044 or 4.4%.
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A Brick hits a window smashing it, which force is larger
The force exerted by the brick on the window is equal in magnitude but
opposite in direction to the force exerted by the window on the brick.
When a brick hits a window and smashes it, there are two forces
involved: the force exerted by the brick on the window and the force
exerted by the window on the brick.
According to Newton's third law of motion, for every action, there is an
equal and opposite reaction.
The magnitude of the forces involved depends on several factors,
including the mass of the brick, its velocity, the angle of incidence, and
the strength of the window. The force exerted by the brick on the
window will be the impact force, which is the force applied over a short
period of time during the collision.
The impact force will depend on the momentum of the brick, which is
the product of its mass and velocity.
It's not possible to say which force is larger because the two forces are
equal in magnitude but opposite in direction, according to Newton's third
law of motion.
The strength of the window will also play a role, as a stronger window
will be able to resist a higher impact force before breaking.
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Evaluate the function f(x) = 4x-6 at the given values of the independent variable and simplify
In general, to evaluate the function f(x) at a specific value of x, we substitute that value into the expression for f(x) and simplify.
What is function?In mathematics, a function is a relation between two sets, where for every element in the first set (called the domain), there is exactly one element in the second set (called the range) that the function maps to. In simpler terms, a function is a rule that assigns each input value from the domain to exactly one output value in the range. Functions are usually represented by a formula or equation that describes the relationship between the input and output values. For example, the function f(x) = 2x + 1 maps every input value of x to an output value that is twice the input value plus 1.
Here,
To evaluate the function f(x) = 4x - 6, we substitute the given values of the independent variable into the expression for f(x) and simplify.
For example:
f(0) = 4(0) - 6 = -6
f(1) = 4(1) - 6 = -2
f(2) = 4(2) - 6 = 2
f(-1) = 4(-1) - 6 = -10
f(3a) = 4(3a) - 6 = 12a - 6
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Which of the following could be the measure of the angle below?
On a coordinate plane, a horizontal straight line is on the x-axis from negative 4 to positive 4.
–180°
–120°
140°
510°
Answer:
-180
Step-by-step explanation:
The measure of the angle on the attached figure is
There are two ways to measuring it
1. Counterclockwise: In this the sign is positive
So,
We can write
180°,
180°+360° = 540°,
180° + 2(360°) =180°+720° =900°,
2. Clockwise: In this, the sign is negative
So,
We can write
-180°,
-180° - 360° = -540°,
-180° - 2(360°) = -180° - 720° = -900°
the correct option is A.
11. Let X 1 ,…,X n,…∼iidBeta(1,β) and let Y n = 1≤i≤n min X i and Z n = 1≤i≤n
max Xi be the sample minimum and maximum of the first n observations. (a) Find the value b such that Yn → pb.
Therefore , the solution of the given problem of probability comes out to be -y^(β-1)/[(β-1)Β(1, β)] .
What is probability exactly?The primary goal of the structures in the style known as parameters is the determination of the likelihood that a claim is accurate or that a specific event will occur. Any number between 0 and 1, at which 1 typically denotes certainty but also 0 typically denotes potential, can be used to symbolise chance. A probability diagram shows the chance that a specific event will occur.
Here,
We are aware that X's PDF is provided by:
If x is between 0 and 1 and 0 otherwise, f(x) Equals 1/B
where represents the size factor.
The formula for Yn's cumulative distribution function (CDF) is
=> F(y) = P(Yn ≤ y) = [P(Xi > y)]ⁿ = [1 - P(Xi ≤ y)]ⁿ
Using the CDF of the beta distribution, we have:
=> F(y) = [1 - Β(1, β; y)]ⁿ
We can approximate Yn by a normal distribution with mean and variance given by the following formulas using the continuity adjustment and central limit theorem:
=> E(Yn) = Β(2, β; 1)/Β(1, β) and Var(Yn) = E(Yn) - [Β(1, β; 1)/Β(1, β)]²
Therefore, we have:
=> (Yn - E(Yn))/sqrt(Var(Yn)) → N(0,1)
With the formulas for E(Yn) and Var(Yn) substituted, we obtain:
=> (Yn - Β(2, β; 1)/Β(1, β))/sqrt[Β(2, β; 1)/Β(1, β) - [Β(1, β; 1)/Β(1, β)]²] → N(0,1)
We need to work out the solution to determine b:
where is the CDF's usual standard value.
After applying the limit and taking the logarithm of both sides, we obtain:
=> F(y) = lim n log[n] = lim n n log
=> [1 - B(1, β; y)] = lim n -n (y, n)/(1, n)
L'Hopital's law gives us:
=> lim n -d/dy [n -(1, y)/n -(1, y)] = lim nn y(-1), ((1, )) ^2Β(2, β; y)
=> -y^(β-1)/[(β-1)Β(1, β)]
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I need help with this demon!
The percentage of of the shaded region is 74.8%
What is area of a circle?A circle is simply a round shape that has no corners or line segments. It is a closed curve shape in geometry. The enclosed body of a circle is called the circumference.
The space enclosed by the boundary of a plane figure is called its area. The area of a figure is the number of unit squares that cover the surface of a closed figure. Area is measured in squared units.
The area of a circle is expressed as :
πr²
The area of the shaded part = area of big circle - area of small circle
= 3.14(8.01²-4.02²)
= 3.14(64.16-16.16)
= 3.14( 48)
= 150.72in²
area of the big circle = 3.14 × 64.16 = 201.46
therefore the percentage of the shaded region of the point = 150.72/201.46 × 100
= 74.8% ( nearest tenth)
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Please ASAP Help
Will mark brainlest due at 12:00
Answer:
plot it on -4
Step-by-step explanation:
Answer: -3
Step-by-step explanation:
Una varilla de plata mide 48 cm a 13°C. ¿Cuál es su longitud si se calienta hasta 500°C? (α=〖2x10〗^(-5) 〖°C〗^(-1)) ayuda se entrega a las 12 del medio dia
The length of the silver rod when heated to 500°C is approximately 48.47 cm.
To solve this problem, we can use the formula:
L₂ = L₁ (1 + αΔT)
where L₁ is the original length of the rod at temperature T₁, L₂ is the new length of the rod at temperature T₂, α is the coefficient of linear expansion of the material, and ΔT = T₂ - T₁ is the change in temperature.
We are given that the original length of the silver rod is L₁ = 48 cm at temperature T₁ = 13°C. The coefficient of linear expansion for silver is α = 2x10^(-5) °C^(-1). The change in temperature is ΔT = 500°C - 13°C = 487°C.
Substituting these values into the formula, we get:
L₂ = 48 cm (1 + 2x10^(-5) °C^(-1) x 487°C)
= 48 cm (1 + 0.00974)
= 48 cm (1.00974)
= 48.47 cm
Therefore, the length of the silver rod is approximately 48.47 cm.
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_____The given question is incorrect, the correct question is given below:
A silver rod measures 48 cm at 13°C. What is its length when heated to 500°C? (α=2x10^(-5) °C^(-1)).
7. what is the value of X in the proportion [tex]\frac{6x+1}{7}[/tex]=[tex]\frac{18x-2}{14}[/tex]
8. john, alana, and jesus are sharing a bag of candy in the extended ratio 2:3:4. if there are 63 candies in the bag, then how many will alana get?
9. which of the following are equivalent to the ratio (2x-6) : (6x-4) ?
Step-by-step explanation:
7. Cross multiply
14( 6x +1) = 7( 18x - 2)
Open the brackets
84x +14 = 126x - 14
Subract 84x from both sides
14 = 42x - 14
Add 14 to both sides
28 = 42x
Divide both sides by 42
X = 28/42
Write in simplest form
X=2/3
8. Add all the ratio 2+3+4= 9
Alana is ratio 3
3/9 x 63 candy = 21 candy
9. 3ab : 27ab
Divide both sides by 3, you have 1ab: 9ab
Divide both sides by ab, you have 1: 9
To raise money for charity, Monica and her friends start the Pampered Pooch Pet Wash. The first day they are open, they forget to put up posters and only raise a little money. The next day, they hang posters all over the neighborhood and raise $55.50. In all, Monica and her friends raise $65.50 on the first two days they are open. Which equation can you use to find the amount of money a Monica and her friends raise on the first day?
55.50a = 65.50
a + 55.50 =65.50
a - 65.50 = 55.50
a - 55.50 =65.50
Answer:
Step-by-step explanation:
[tex]a[/tex] is the amount earned on the first day.
She earnt $[tex]$a[/tex] dollar on day 1, $55.50 on day 2, and $65.50 total in the 2 days.
So we get
[tex]a+55.50=65.50[/tex]
A home-improvement store sold wind chimes for $30 each. A customer signed up for a free membership card and received a 5% discount off the price. Sales tax of 8% was applied after the discount. What was the final price of the wind chime?
sale price=$30
discount price=0.05
Taking it $30*0.05=600$
after applying 0.08
600*0.08=48$
, so 48$ is the final price of the wind chime.
Consider a population of size N = 14,600 with a mean of μ = 156 and standard deviation of a = 23.
Compute the following z-values for sampling distributions of with given sarkple size. Round solutions to
two decimal places, if necessary.
The z-values of the sampling distributions are;
z = 2.27z = -2.09z = -2.2z = -3.33What is a sampling distribution?A sampling distribution is a probability distribution obtained through the repeated sampling of a specified population.
The z-value for a sampling distribution can be obtained using the formula;
[tex]z = \frac{\bar{x} -\mu}{\frac{\sigma}{\sqrt{N} } }[/tex]
Where;
[tex]\bar{x}[/tex] = The sample mean
μ = The population mean = 156
σ = The population standard deviation = 23
N = The sample size
The z-values for the sampling distributions are therefore;
1) The number of observations selected from the population, is 76, and the sample mean is; [tex]\bar{x}[/tex] = 162, we get the following z-value.
When, N = 76 and [tex]\bar{x}[/tex] = 162
[tex]z = \frac{162-156}{\frac{23}{\sqrt{76} } } \approx 2.27[/tex]2) The selected observations is 92, and the sample mean is; [tex]\bar{x}[/tex] = 151, we get the following z-value.
When, N = 92 and [tex]\bar{x}[/tex] = 151
[tex]z = \frac{151-156}{\frac{23}{\sqrt{92} } } \approx -2.09[/tex]3) The number in the random sample, N = 102 and the sample mean is; [tex]\bar{x}[/tex] = 151, we get;
When, N = 102 and [tex]\bar{x}[/tex] = 151
[tex]z = \frac{151-156}{\frac{23}{\sqrt{102} } } \approx -2.2[/tex]4) The number of observations in the random sample, N = 120 and the sample mean is; [tex]\bar{x}[/tex] = 149, we get;
When, N = 120 and [tex]\bar{x}[/tex] = 149
[tex]z = \frac{149-156}{\frac{23}{\sqrt{120} } } \approx -3.33[/tex]Learn more on the z-values of a sampling distribution here: https://brainly.com/question/14263321
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Alex and Sam both work for the same lawn-mowing service. The equation Y=20x gives the relationship between the amount Alex earns, y, by mowing for x hours. the table shows the amount Sam earns working different amounts of hours.
How much more does alex earn per hour, in dollars, than sam?
I NEED THIS ANSWER FAST! 20 POINTS POSSIBLE!
The amount more that Alex earn per hour more than Sam is $2.
How much more does Alex earn?A linear equation is an equation that has a single variable that is raised to the power of one. The general form of a linear equation is
y = mx + c
Where:
m = slope c = interceptThe linear equation that represents the amount that Alex earns is y = 20x. This means that for every hour worked, Alex earns $20. Looking at the table, Sam earns $18 for every hour worked. This can be represented with the equation : y = 18x
The difference in the amount earned = 20 - 18 = $2
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A hose fills a 3-gallon bucket in 9 seconds. At this rate, how long will it take to fill a bucket that is 67% larger than the 3-gallon bucket? Round to the nearest second.
It took 15.03 seconds to fill the 67% larger than the 3-gallon bucket
Calculating the time required to fill the bucket:
To solve this problem, use the concept of proportionality to calculate the time required. Use the concept of percentage increase to find the volume of the larger bucket, which was 67% larger than the 3-gallon bucket.
Here we have
A hose fills a 3-gallon bucket in 9 seconds.
The volume of the bucket which is 167% more than 3 gallons
= 167% of 3 gallons = [167/100] × 3 = 5.01 gallons
It took 9 seconds to fill 3 gallons
The time required to fill 5.01 gallons = 9/3 × [5.01]
= 15.03 seconds
Therefore,
It took 15.03 seconds to fill the 67% larger than the 3-gallon bucket
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five college students with the flu return to an isolated campus of 2500 students. assume the rate at which the virus spreads is proportional to both the number of students infected and the number of students not infected.
According to proportionality, the virus will spread at a rate of 12475 students per day.
If five college students with the flu return to an isolated campus of 2500 students, and the rate at which the virus spreads is proportional to both the number of students infected and the number of students not infected, then we can use the following formula to find the rate of spread:
Rate of spread = (number of students infected) x (number of students not infected)
In this case, the number of students infected is 5 and the number of students not infected is 2500 - 5 = 2495. So, the rate of spread is:
Rate of spread = 5 x 2495 = 12475
This means that the virus will spread at a rate of 12475 students per day, assuming that the rate of spread is proportional to both the number of students infected and the number of students not infected.
It is important to note that this is a simplified model and does not take into account other factors that may affect the rate of spread, such as the effectiveness of quarantine measures or the individual immune systems of the students. However, it does give us an idea of how quickly the flu can spread in a population of 2500 students.
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If the y intercept is 4, the x coordinate is 4 and the y coordinate is 12, what is the gradient
the slope goes by several names
• average rate of change
• rate of change
• deltaY over deltaX
• Δy over Δx
• rise over run
• gradient
• constant of proportionality
however, is the same cat wearing different costumes.
[tex]\stackrel{ y-intercept }{(\stackrel{x_1}{0}~,~\stackrel{y_1}{4})}\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{12}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{12}-\stackrel{y1}{4}}}{\underset{\textit{\large run}} {\underset{x_2}{4}-\underset{x_1}{0}}} \implies \cfrac{ 8 }{ 4 } \implies 2[/tex]
What is the equation of the line that passes through the point (-3, 4) and has a
slope of 2/3?
Answer:
y = 2/3x + 6
Step-by-step explanation:
The equation is y = mx + b
m = the slope
b = y-intercept
We know
m = 2/3
Y-intercept is located at (0, 6)
So, our equation is y = 2/3x + 6
Option #1: point-slope form: y - y1 = m ( x - x1 )
y - 4 = 2/3 ( x - (-3) ) or y - 4 = 2/3 ( x + 3 )
Option #2: slope-intercept form: y = mx + b
Take the point-slope and solve for y:
y - 4 = 2/3 ( x + 3 )
y - 4 = 2/3 x + 2
y = 2/3 x + 6
I need help solving this problem
By speed fοrmula, light frοm the star takes abοut 1.3 x 10⁹secοnds tο reach Earth.
What is speed?Speed is defined as the distance travelled by an οbject in a given amοunt οf time. Speed is a scalar quantity, meaning that it has magnitude but nο directiοn.
Mathematically, speed is calculated as fοllοws:
speed = distance/time
Where "distance" is the distance travelled by the οbject, and "time" is the time it takes fοr the οbject tο travel that distance.
We can use the fοrmula:
time = distance/speed
where distance is the distance frοm the star tο Earth, and speed is the speed οf light.
Putting the values, we get:
time = (3.9 x 10¹⁴ km) / (3.0 x 10⁵km/s)
Simplifying, we can divide the distances and divide the pοwers οf ten:
time = 1.3 x 10⁹ s
Therefοre, light frοm the star takes abοut 1.3 x 10⁹secοnds tο reach Earth.
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Which function is increasing?
A. F(x) = 5^x
B. F(x)=(0. 5)^x
C. F(x) = (1/15)^x
D. F(x)= (1/5)^x
In the given functions [tex]5^x[/tex] function is increasing because 5>1.
Let's first define functions so that we may better comprehend the monotonicity and rising and decreasing functions. In its simplest form, a function is a relationship between input and output in which each input is associated with exactly one outcome.
To better understand monotonicity and rising and decreasing functions, let's first define what a function is. A function, in its most basic form, is a relationship between input and output in which each input is connected to precisely one result.
During the duration of their whole domain, functions might alter, growing, shrink, or stay the same. Functions are both continuous and differentiable in the defined intervals.
Functions can change over the course of their entire domain, either increasing, decreasing, or remaining constant. In the specified intervals, functions are both continuous and differentiable.
We have all the functions that are exponential
So when we shall check all the given function
We observe that we have functions of the form:
f (x) = A[tex]b^x[/tex]
When
b > 1 The function grows
b <1 Function decreases
Hence [tex]5^x[/tex] function is increasing.
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Choose the expression that is equivalent to a fraction with four raised to the negative third power in the numerator and the quantity three raised to the negative second power times four squared end quantity in the denominator and the entire fraction is cubed
Answer: go look on yt there’s a good video on this one
Step-by-step explanation:
7th grade teacher decided to have her students take the same survey. She could found that 7 students or 35% of her students, prefer rock music. How many students are in this class
use differentials to approximate the change in cost corresponding to an increase in sales (or production) of one unit. then compare this with the actual change in cost. (round your answers to two decimal places.)Function x-Value C = 0.075x^2 + 6x + 7 X = 10x-valuex = 10
The approximate change in cost corresponding to an increase in sales of one unit is 8.50. and actual change in cost is 8.25.
To answer this question, we need to use differentials to approximate the change in cost corresponding to an increase in sales (or production) of one unit. To do this, we need to calculate the derivative of the given cost function C = 0.075x^2 + 6x + 7.
The derivative of this function is dC/dx = 0.15x + 6. We can now use this derivative to approximate the change in cost when x is increased by one unit. This is given by dC/dx = 0.15(10) + 6 = 8.5.
To compare this with the actual change in cost, we can calculate the change in cost when x is increased from 10 to 11. This is given by C(11) - C(10) = (0.075x^2 + 6x + 7) | 11 - (0.075x^2 + 6x + 7) | 10 = 0.075(121) + 66 + 7 - 0.075(100) - 60 - 7 = 8.25.
Therefore, the approximate change in cost when x is increased by one unit (calculated by differentials) is 8.50 and the actual change in cost is 8.25. This shows that the approximate change in cost calculated by differentials is an accurate estimation of the actual change in cost.
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help me with this question please
Answer:
2.50 p + 1.50p
Step-by-step explanation:
if you buy an item x amount of times you would times the two to figure out the total cost of that type of item then add with the other
The percent of carbon-14 remaining in a fossil can be found using the exponential expression (1/2)^t/5730 where t represents the age of the fossil in years. Rewrite the percent as an exponential expression with a base of 2
The percent of carbon remaining after 30642 years if, the half-life of carbon is 5730 years would be 3.1%
Total time is given: 30642 years
Half-Life of carbon-14 : 5730 years
After 1 half-life of the carbon-14 remaining carbon: 1/2
After 2 half-lives the carbon-14 remaining carbon : 1/4
After 3 half-lives the carbon-14 remaining carbon : 1/8
...
...
After n half-lives the carbon-14 remaining carbon : (1/2)^n
Number of half-lives in 30642 years: 30642 / 5730 ≈ 5 approx.
Amount of carbon remaining after 5 half-lives: 1/32
1/32 ≈ 0.031 = 3.1%
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how to rewrite the mixed number as an improper fraction. draw please help me bc it do tomorrow PLEASE HELP PLEASE IT DO TOMORROW.
Answer:
To rewrite a mixed number as an improper fraction, you need to multiply the whole number by the denominator of the fraction, then add the numerator. The resulting sum is the numerator of the improper fraction, while the denominator remains the same.
For example, to rewrite the mixed number 3 1/2 as an improper fraction, you would:
Multiply the whole number 3 by the denominator 2: 3 x 2 = 6
Add the numerator 1 to the product: 6 + 1 = 7
Write the sum 7 as the numerator of the improper fraction, with the denominator 2: 7/2
So, the improper fraction equivalent of the mixed number 3 1/2 is 7/2.
Step-by-step explanation:
The base of the pennant measures 3 inches and the height of the pennant measures 5 inches if austin is covering the pennant with paint how much of the surface will be covered?
Austin needs to cover 15 square inches of surface area with paint in order to finish the task.
The area of the pennant is the length times the width, which is 3 inches times 5 inches. This gives us 15 square inches of surface area to be covered. To calculate the amount of paint needed, we first need to calculate the area of the pennant. The formula for area is area = length x width. Plugging in the measurements for the base and height of the pennant, we get 15 square inches of surface area. This means that Austin needs to cover 15 square inches of surface area with paint in order to finish the task.
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Two radar stations have been positioned 6 miles apart at points A and B. Point D is located exactly 3 miles from point A. A plane is flying overhead at point C such that the radar stations and the plane are all equidistant. What should be the vertical distance from the plane to point D? Round the answer to the nearest tenth of a mile. miles
Therefore, DM = 0, which means that the plane is directly above point D. Pythagorean theorem The vertical distance from the plane to point D is simply the altitude of the plane.
what is Pythagorean theorem?The Pythagorean Theorem is the fundamental Euclidean geometry relationship between the three sides of a right triangle. According to this rule, the area of a square with the hypotenuse side equals the sum of the areas of squares with the other two sides.
drawing a diagram
A ------ 3 miles ------ D ----- x miles ------ C
| |
| |
6 miles 6 miles
| |
| |
B -----------------------------------------------
[tex]AC^2 = AD^2 + DC^2\\BC^2 = BD^2 + DC^2\\AD^2 + DC^2 = BD^2 + DC^2\\AD^2 = BD^2[/tex]
So, the plane must be directly above the midpoint of AB. Let's call this point M:
A ------ 3 miles ------ D ----- x miles ------ C
| |
| |
6 miles 3 miles 6 miles
| |
| |
B -----------------------------------------------
|
|
M
Now, let's use Pythagoras' theorem again to find the distance from the plane to point D:
[tex]DM^2 = AD^2 - AM^2\\DM^2 = AD^2 - 3^2\\DM^2 = 3^2 - 3^2\\DM^2 = 0[/tex]
Therefore, DM = 0, which means that the plane is directly above point D. The vertical distance from the plane to point D is simply the altitude of the plane.
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An article suggests the uniform distribution on the interval (6.5, 21) as a model for depth (cm) of the bioturbation layer in sediment in a certain region. (a) What are the mean and variance of depth? (Round your variance to two decimal places.) mean variance (b) What is the cdf of depth? F(x) = {0 x < 6.5 6.5 lessthanorequalto x < 21 1 21 lessthanorequalto x (c) What is the probability that observed depth is at most 10? (Round your answer to four decimal places.) What is the probability that observed depth is between 10 and 15? (Round your answer to four decimal places.) (d) What is the probability that the observed depth is within 1 standard deviation of the mean value? (Round your answer to four decimal places.) What is the probability that the observed depth is within 2 standard deviations of the mean value?
Answer : a ) Variance = (21 - 6.5)^2/12 = 13.7708, b) 1, 21 <= x, c) Probability = 0.5862, D) Probability = 0.8552
The uniform distribution on the interval (6.5, 21) can be represented as U(6.5, 21).
(a) The mean and variance of a uniform distribution can be calculated using the following formulas:
Mean = (a + b)/2
Variance = (b - a)^2/12
where a and b are the lower and upper bounds of the distribution, respectively.
For the given distribution, a = 6.5 and b = 21.
Therefore, the mean and variance of depth are:
Mean = (6.5 + 21)/2 = 13.75
Variance = (21 - 6.5)^2/12 = 13.7708
(b) The cdf of a uniform distribution can be calculated using the following formula:
F(x) = (x - a)/(b - a)
For the given distribution, F(x) = (x - 6.5)/(21 - 6.5) for 6.5 <= x < 21.
Therefore, the cdf of depth is:
F(x) = {
0, x < 6.5
(x - 6.5)/14.5, 6.5 <= x < 21
1, 21 <= x
(c) The probability that observed depth is at most 10 can be calculated using the cdf:
P(X <= 10) = F(10) = (10 - 6.5)/14.5 = 0.2414
The probability that observed depth is between 10 and 15 can be calculated using the cdf:
P(10 <= X <= 15) = F(15) - F(10) = (15 - 6.5)/14.5 - (10 - 6.5)/14.5 = 0.5862
(d) The standard deviation of a uniform distribution can be calculated using the following formula:
Standard deviation = sqrt(Variance)
For the given distribution, the standard deviation is:
Standard deviation = sqrt(13.7708) = 3.7118
The probability that the observed depth is within 1 standard deviation of the mean value can be calculated using the cdf:
P(13.75 - 3.7118 <= X <= 13.75 + 3.7118) = F(13.75 + 3.7118) - F(13.75 - 3.7118) = (13.75 + 3.7118 - 6.5)/14.5 - (13.75 - 3.7118 - 6.5)/14.5 = 0.5118
The probability that the observed depth is within 2 standard deviations of the mean value can be calculated using the cdf:
P(13.75 - 2*3.7118 <= X <= 13.75 + 2*3.7118) = F(13.75 + 2*3.7118) - F(13.75 - 2*3.7118) = (13.75 + 2*3.7118 - 6.5)/14.5 - (13.75 - 2*3.7118 - 6.5)/14.5 = 0.8552
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A car hire company charged rs. C a day together with an additional rs. C per mile work out the total charge for hiring a car for 50 days and travelling 2500 miles during that time
The fixed charge for a taxi ride is Rs. 5 and the charge per km is Rs. 7.
Given that the charge for a 12 km ride is Rs. 89 and for a 20 km ride is Rs. 145, we can form two equations in terms of the fixed charge (c) and the charge per km (x).
Solving these equations, we get c = 5 and x = 7. Therefore, the fixed charge for a taxi ride is Rs. 5 and the charge per km is Rs. 7. To find the charge for a 30 km ride, we can substitute these values in the formula
c + 7x, which gives us 5 + 7x30 = Rs. 215.
89 = c + 12x ---------------(1)
145 = c + 20x -------------(2)
Solving equations 1 and 2, we get,
8x = 56
x = 7.
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Complete Question:
The car hire charges in a city comprised of a fixed charge together with the charge for the distance covered. For a journey of 12 km, the charge paid is Rs 89 and for a journey of 20 km, the charge paid is Rs 145. What will a person have to pay for traveling a distance of 30 km?