Author Question: Which of the sample sizes below will produce a sampling distribution of the mean that is ... (Read 77 times)

jhjkgdfhk

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Which of the sample sizes below will produce a sampling distribution of the mean that is approximately normal?
 a. 10
  b. 20
  c. 30
  d. 40
  e. all of these

Question 2

A Marine drill instructor recorded the time in which each of 15 recruits completed an obstacle course both before and after basic training. To test whether any improvement occurred, the instructor would use a t-distribution with 15 degrees of freedom.
  Indicate whether the statement is true or false



maya.nigrin17@yahoo.com

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Answer to Question 1

C

Answer to Question 2

F



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