ZuoTi.Pro
Question

How large a sample should be selected to provide a confidence interval with a margin of...

How large a sample should be selected to provide a confidence interval with a margin of error of 7? Assume that the population standard deviation is 10. Round your answer to next whole number.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Here we have: σ 10 Margin of error7 Margin of error -Za/2 X Note: here we have α (alpha) value not given we assume α-0.05 a/2 - Zo o5/2-1.96 7 1.96 X 10 1.96x 10 7 N 8(round next whole number) (Here sample size is also affected according to change of alpha value)

0 0
Add a comment
Answer #2

if i write as it is n actually comes down to 2.8 then we need to square root it to 2 

so 2.8^2 and it will be 7.84

answered by: Yr
0 0
Add a comment
Know the answer?
Add Answer to:
How large a sample should be selected to provide a confidence interval with a margin of...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT