1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lianna [129]
3 years ago
15

Determine the sample size needed to construct a 99​% confidence interval to estimate the average GPA for the student population

at a college with a margin of error equal to 0.7. Assume the standard deviation of the GPA for the student population is 1.0. The sample size needed is nothing. ​(Round up to the nearest​ integer.)
Mathematics
1 answer:
Volgvan3 years ago
3 0

Answer: n = 14

Step-by-step explanation: margin of error = critical value × σ/√n

Where σ = population standard deviation = 1

n = sample size = ?

We are to construct a 99% confidence interval, hence the level of significance is 1%.

The critical value for 2 tailed test at 1% level of significance is gotten from a standard normal distribution table which is 2.58

Margin of error = 0.7

0.7 = 2.58×1/√n

0.7 = 2.58/√n

By cross multipying

0.7×√n = 2.58

By squaring both sides

0.7^2 × n = 2.58^2

0.49 × n = 6.6564

n = 6.6564/0.49

n = 14

You might be interested in
Please help I have tried over and over and can't get it​
nirvana33 [79]
1) -3
2) 6
3) 4
4) 2
5) 5
6) 5
7) 7
8) -3
9) 9
10) 6
11) -5
12) 0

Here are your answers may I please have the brainliest
5 0
2 years ago
A football has a water container with 25 liters of water in it. Each players needs 3 liters of water to stay hydrated. Write as
KIM [24]
Improper fraction: 25/3
Mixed number: 8 1/3
8 0
3 years ago
Hi soooooooo give me a problem to answer
DanielleElmas [232]

Answer: what is 6709583 to the power of 568403 simplified in scientific notation and divided by 3 and graphed as a quadratic.

Step-by-step explanation: Hope this helps :)

6 0
3 years ago
7. Find the perimeter of the pentagon ABCDE.
oksian1 [2.3K]

Answer:

Step-by-step explanation:

32.5

4 0
2 years ago
What power of 2 is equal to the expression below
Brut [27]

Answer:

Daddy

Step-by-step explanation:

Chill

5 0
3 years ago
Other questions:
  • Dan and Jake have new stamp collecting books. Dan puts 5 stamps in his book every day, and Jake puts 6 stamps in his book every
    7·1 answer
  • Please help asap 40 pts
    10·2 answers
  • The sum of two numbers is 14. The first number 2/5<br> of the second number. What are the numbers?
    11·1 answer
  • Wich algebraic expression represents ”forty times a number”?<br><br> 40+n<br> 40n<br> n-40<br> 40/n
    13·2 answers
  • A house blueprint has a scale of 1in : 10ft the length and width of each room in the actual house are shown in the table complet
    8·1 answer
  • Which parametric equations represent (x + 1)2 + (y – 3)2 = 16
    13·2 answers
  • Today only, a sofa is being sold at a 72% discount. The sale price is 218.40.
    7·1 answer
  • Please help!!!!im struggling!!!!!!!!!
    11·1 answer
  • X is all of the following except ____.
    5·2 answers
  • Please help me answer this question.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!