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Author Question: What sample size should be used if we would like to estimate the mean age of the individuals who ... (Read 104 times)

LCritchfi

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on: Jul 24, 2018

  What sample size should be used if we would like to estimate the mean age of the individuals who are attend a university with a 95 confidence interval that has a width of at most 5 years? Assume the population is normally distributed with a standard deviation of 4.2 years.
 

  a.The sample size should be 10.
  b.The sample size should be 19.
  c.The sample size should be 11.
 

d.The sample size should be 8.
 
 



Question 2


  Which of the following is the correct formula for a confidence interval for when both and are estimated?
 

  a. with df = n - 1
  b. with df = n - 1
  c. with df = n - 1
 

d.
 
 



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asdfasdf

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Reply #1 on: Jul 24, 2018
Answer to Question 1

correct: c

Answer to Question 2

correct: a


LCritchfi

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Reply 2 on: Jul 24, 2018
Gracias!

nathang24

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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