Suppose you plan to take a survey of Math 146 students asked about their overall grades at CBC. 22 students were surveyed, and it was found that the average GPA of the 22 sampled students was a 3.2, with a standard deviation of 0.9 points. Suppose you want to re-sample the population to reduce the margin of error. If you plan to calculate a 90% confidence interval for the true mean GPA of Math students, how many samples would be necessary to reduce the margin of error to 0.2 points?

Answers

Answer 1

Step-by-step explanation:

we have the data set given below here and using it, we want to find the sample mean X. Bar, the sample standard deviation S. And constructed 99% confidence interval for the population we knew, assuming the population is normally distributed. So since we have this data we can find expire and s using the appropriate definitions expire, is that some of the data divided by n 2.353 and s. Is the square root of the sum of deviations of the mean square divided by n minus one. In this case 1.3 Now with X. Bar and sample standard deviation S, we can use a student's t distribution to construct this confidence interval. So we can identify the appropriate T score. So for the degree of freedom and minus one equals 14 and critical values um providing probability 140.99 for the confidence interval,  to identify T C equals 2.977 Now, with this T. C, we can identify the margin of error E, which is given by this formula plugging in our T C. S and N. We obtain E equals 0.572 And now plugging into our confidence interval formula, which is that new falls between a sample mean minus C, and sampling plus E gives us our confidence interval. That new is between 1.781 and 2.9 to 5 with 99% confidence.


Related Questions

Find the value of a when b = 7 and c = 6 in the formula a=(b+c) - 2. ​

Answers

Answer:

a = 11

Step-by-step explanation:

a = (7+6) - 2

a = 13 - 2

a = 11

10.
Use the quadratic function to predict y if x equals 6.

y = 2x2 − 2x − 2

A. y = 60

B. y = 58

C. y = −60

D. y = −58

Answers

Answer:

B. y = 58

Step-by-step explanation:

b) y=58 you follow the instructions

...............................................................................................................................................

The given quadratic function is      

y= 2x^2 - 2x - 2

We have to find the value of the function y at x=6.

Substitute x=6 in the given function.      

y= 2(6)^2 - 2(6) - 2

y= 2(36) - 12 - 2

y= 72 - 14

y= 58

The value of the function is 58 at x=6 is 58.

Therefore the correct option is B.

pa sagot po ty po sa sasagot ​

Answers

Answer:

An account-ant

Step-by-step explanation:

What is the final cost of a $40 item after a 8% tax is applied

Answers

$43.2. to do this, you first find 8% of 40 by doing 40 times 0.08. this is equal to 3.2. next, since it's 8% tax, you add 3.2 to 40. this is how i got $43.2

Given that angle a = 15° and angle b = 5°, work out x

Answers

this cant be all the question

Which value of x would make the following matrix singular?
5 x
3 6

Answers

Answer: 10

Explanation:

(30)-(30)= 0

Singular matrices must equal 0

(Correct on my quiz)

The value of x would make the following matrix singular is 10

Matrices of a function

For a matrix to be singular, the determinant of the matrix must be zero.

For the given 2 by 2 matrix, for the matrix to be a singular matrix then, its determinant must be zero as shown;

(5* 6) - (3 * x) = 0

30 - 3x = 0

3x = 30

x = 10

Hence the value of x would make the following matrix singular is 10

Learn more on singular matrix here: https://brainly.com/question/23849390

#SPJ6

NO LINKS!!!

Complete the following problems to the best of your knowledge. Show all your work. Part 1

Answers

Step-by-step explanation:

#1

a. -6, -9, 12

There is no sequence since the difference between the terms is not common and the ratio of the terms is not common

b. t(n) = 0.5 - 6

There is no sequence as all the terms are same regardless the value of n

c. 32, 16, 8

The sequence is geometric as common ratio is 1/2, each next term is half the previous one#2

a. 8, 16, 32, 64, ...

This is a geometric sequence as the common ratio is 2

b. 1, 1, 2, 3, 5, 8, ...

This is neither one since no common difference or ratio between the consecutive terms

c. 5, 5, 5, ...

This is neither one since common difference is zero or common ratio is 1

d. -101, -99, -97, -95, ...

This is a arithmetic sequence since the common ratio is 2#3

According to question the sequence is:

200000, 100000, 50000, ...

We see each number is half the previous one so this is a GP with common ratio of 1/2

How many Solutions does 6 + x/5 = x/5 - 5 - 3x/10 have?

Answers

9514 1404 393

Answer:

  1 solution (x = -36 2/3)

Step-by-step explanation:

  6 + x/5 = x/5 - 5 - 3x/10 . . . . . . . given

  60 +2x = 2x -50 -3x . . . . . . . . . multiply by 10

  3x = -110 . . . . . . . . . . . . . . . .  add x-60 to both sides

  x = -110/3 = -36 2/3 . . . . . .divide by the coefficient of x

There is one solution to the equation.

_____

Additional comment

The coefficient of x on the left side of the equation is not equal to the coefficient of x on the right side. When that is the case, the equation will have one solution.

When the coefficients are equal, there will be no solutions if the constants are different, and there will be infinite solutions if the constants are the same.

identify the pair of similar triangles in each of the groups of triangle below​

Answers

Answer:

its triangle ABC and XYZ

Step-by-step explanation:

PLEASE HELP WITH THIS QUESTION

Answers

Answer:

which question can I help you

A school has 320 girls and 250 boys
The probability that a girl is left handed is 0.2
The probability that a boy is left handed is 0.1
Estimate the umber of left handed students in the school.

Answers

320/100 • 20 = 64
250/100 • 10 = 25
64+25= 89 <33

Solve
-12 + 23

A. -35

B. -11

C. 11

D. 35

Answers

Answer:

C. 11

Step-by-step explanation:

This can be rewritten as

23 - 12

This is equal to 11.

Answer:

11

Step-by-step explanation:

-12 + 23 = 11

since the 12 is negative subtract it from 23 and you get 11 as your answer

1. Two linear functions are shown below. Which function has the greater rate of change? Function A Function B 10 у y 4 32 8 8 6 44 12 4 56 2 16 68 Х 0 20 80 0 2 4 6​

Answers

Answer:

I don't understand clear ur question

HELP!! DUE IN 10 MINS!!!
Solve the following system using the elimination method.

x+y=12
x−y=12

Answers

Answer:

x = 12

y = 0

Step-by-step explanation:

Sum them:

2x = 24

so x = 12

12 - y = 12

so y = 0

Find m∠BXY.

HELPPPPP PLS

Answers

Answer:

60°

Step-by-step explanation:

Connecting the mid points of the three sides of the triangle makes four more  triangles all similar and half the size of the original. Corresponding angles of similar triangles have the same measure.

Please find the correct answer will give high points, mark brainliest, give 4 stars, and hearts. PLS


Answers

Answer d is correct.
|0.35| is equal to 0.35, |-0.81| is equal to 0.81.
-|0.81| is equal to -0.81.
Answer d is correct because -|0.81| is equal to a negative number and is less than 0, and d is the only answer that states that

A rectangular garden is 5 ft longer than it is wide. Its area is 4550 ft. What are its dimensions?

Answers

Step-by-step explanation:

Area= lxb

L = 5+d

area= d(5+d)

4550=d²+5d

d²+5d-4550=0

d2+5d−4550=0

(d−65)(d+70)=0

d−65=0 or d+70=0

d=65 or d=−70

dimensions= 65, 70

Moneysaver's Bank offers a savings account that earns 5% interest compounded continuously. If Ravi deposits $3200, how much will he have in the account
after six years, assuming he makes no withdrawals?
Do not round any intermediate computations, and round your answer to the nearest cent
x
5
?

Answers

the answer is 4160$

     After 6 years of investment of $3200 compounded continuously, final amount in the account will be $4319.55.

Moneysaver's Bank offers a saving account with the features as,

Rate of interest = 5% annualTime of investment = 6 yearsPrincipal amount = $3200

Expression to calculate the final amount when compounded continuously,

Final amount = [tex]P.e^{rt}[/tex]

Here, P = Principal amount

r = Rate of interest

t = Duration of investment

By substituting the values in the expression,

Final amount = [tex]3200.e^{0.05\times 6}[/tex]

                      = 3200(1.3498588)

                      = 4319.548

                      ≈ $4319.55

  Therefore, after 6 years of investment of $3200, final amount in the account will be $4319.55.

Learn more,

https://brainly.com/question/2141828  

Your team wins 24 medals . The medals are Gold, silver and
bronze in a ratio of 1:1:6. How many of each did your team win ?

Answers

Gold: 3 Silver: 3 Bronze: 18
Gold would be three medals, silver would be three medals and finally bronze medals are 18

Find the complementary Angle of 24 / 1/5

Answers

The answer is 24
Ok done. Thank to me:>

Jim swam 8 laps on Tuesday, 19 laps on Wednesday, 30 laps on Thursday, and 41 laps on Friday. What kind of sequence is this? both neither arithmetic geometric​

Answers

It may be the Harmonic Sequence but I am not sure.

Please help! How to do this? Ill give brainly

Answers

Answer:

c=60

d=45

Step-by-step explanation:

3c=180

c=60

4d=180

d=45

1. Find the coordinates of all points where the lines
x + y = 8, y = 5, and x = 1 intersect.

Answers

Answer:

(3)1. Find the coordinates of all points where the lines

x + y = 8, y = 5, and x = 1 intersect.

Step-by-step explanation:

this answer

The coordinates of all points where the lines x + y = 8, y = 5, and x = 1 intersect are (0, 5), (1, 0), (3, 5) and (1, 7).

Given that;

The equation of lines is,

x + y = 8

y = 5

x = 1

Now all the coordinates of all points where the lines x + y = 8, y = 5, and x = 1 intersect are find as,

x + y = 8

Put y = 5;

x + 5 = 8

x = 8 - 5

x = 3

Put x = 1;

1 + y = 8

y = 8 - 1

y = 7

Therefore, the points are (0, 5), (1, 0), (3, 5) and (1, 7).

Learn more about the coordinate visit:

https://brainly.com/question/24394007

#SPJ3

Use the long division method to find the result when 12x^3+25x^2+4x-112x
3
+25x
2
+4x−1 is divided by 3x+13x+1.

Answers

Answer:

(4x + 3) • (x + 2) • (3x - 2)

Thats finding the root polynomials hope it helps a bit

Brainliest to the one that is 100% right
;)

Answers

Answer:

A is correct.

C. is correct.

D. is correct.

Step-by-step explanation:

A follows the commutative property, putting two fractions in parenthesis, and follows PEMDAS to simplify the answer.

B uses other random numbers and does NOT follow the property.

C follows the commutative property too.

D. also follows the property, same as A and C.

I hope this is a multiple choice question.

The hypotenuse of a right triangle is three times the length of one of its legs. The length of the other leg is four feet. Find the lengths of the three sides of the triangle. For non-integer answer(s), round your answer(s) to the nearest tenth.
___feet, ___feet, ___feet

Answers

then then then

okokokokokokok

A and B stand in a line at random with 10 other people. What is the probability that there are exactly 3 people between A and B?

Answers

Answer:

so no answer

Step-by-step explanation:

no answer

Evaluate


[2- |-2/3 -2(-1/5)|] (-13)


What is the value of the expression?


Enter your answer as a simplified fraction in the box.

Answers

Answer: the answer - 2/15

Step-by-step explanation: i took the test

The value of the expression [2- |-2/3 -2(-1/5)|] ÷ (-13) is -2/15

What is an expression?

Numbers, symbols and operators grouped together that show the value of something.

Given that an expression [2- |-2/3 -2(-1/5)|] ÷ (-13)

[2- |-2/3 -2(-1/5)|] ÷ (-13)

= [2 - 4/15]/ (-13)

= 26/15*1/(-13)

= -2/15

Hence, The value of the expression [2- |-2/3 -2(-1/5)|] ÷ (-13) is -2/15

For more references on expression, click;

https://brainly.com/question/14083225

#SPJ5

select the reasons

options for #3
- definition of a quadrilateral
- if two lines are parallel and cut by a transversal, then the alternate interior angles are congruent

options for #5
- ASA congruence property
- SAS congruence property
- definition of a quadrilateral

Answers

Step-by-step explanation:

Givens:

ParallelogramQR || TSQT || RSQS ≅ SQ

With that information, we can figure out the rest.

∠RQS≅∠TSQ and ∠QSR≅∠SQT --- these are alternate interior angles, on opposite sides of the transversal QS while between parallel lines

Finally, ΔQST≅SQR because of ASA.

===============

sorry that took so long, I severely overcomplicated things before seeing the simple solution

Determine the slope and y-intercept of a line that passes through the points (2, 4) and (–4, 1).
m = [ A. –2.5 , B. –1.5 , C. 0.5 ]
b = [ A. 3, B. 7, C. 9 ]

Answers

Answer:

m = [C. 0.5]b = [A. 3]

Step-by-step explanation:

Slope- intercept form:

y = mx + b, where m is the slope, b is the y-intercept

Given points:

(2, 4) and (-4, 1)

The slope is:

m = (1 - 4)/(- 4 - 2) = - 3/ - 6 = 1/2 = 0.5

Use point (2, 4) to find the value of the y-intercept:

y = mx + b4 = 0.5*2 + bb = 4 - 1b = 3

Other Questions
What is vibration???? 7 Harper ordered 22 shirts for her soccer team. Seventy-five percent of these shirts were saa samall. How manyseal shirts did Harper order? 350 items have donated to the community food pantry and 35 of the items are jars of peanut butter. What percent of the donated items are jars of peanut butter? Does anyone know how to solve this:22 - 6x > 4 Joshua borrowed $1000 from his friend and paid him back $1050 in six months. What simple annual interest did Joshua pay his friend? what is Economics in simple terms Whats the answer to 420 - 69? A sample of SO2 gas occupies 45.6 L at 373 K and 3.45 atm. How many moles of oxygen atoms? Help help please last question please correct Ill give points For a triangle. Find m giving brainiest follow likes and ty!!!help ill do anything what other countries celebrate veterans with a special day list one benefit of having an article from a database mailed to yourself -3(p+2) when p=6Anybody The sum of two numbers is 72.The difference is 40.Find the number Which type of climate do you prefer to live in? Why? Give reasons What is the birth rate of a population of 3000 chipmunks if 200 chipmunks are born each year?o 0.022 births per chipmunk per year.0.067 births per chipmunk per year.O 0.82 births per chipmunk per year.o 15 births per chipmunk per year. Please help me, I'm having a hard time The initial temperature of the mixture was +20 C. The mixture froze at -1.5 C.A total of 165 kJ of internal energy was transferred from the mixture to cool andfreeze it.specific heat capacity of the mixture = 3500 J/kg Cspecific latent heat of fusion of the mixture = 255 000 J/kgCalculate the mass of the mixture.Give your answer to 2 significant figures.[6M what will you do if you have to stay amongst common cold patients