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Author Question: Suppose a 95 confidence interval for the difference between the average age of females employed by ... (Read 131 times)

crobinson2013

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on: Jun 24, 2018

  Suppose a 95 confidence interval for the difference between the average age of females employed by Company A and the average age of females employed by Company B is (-4.7,6.5). Which of the following hypotheses can be tested at the level using the information given?
 

  a.H0: versus Ha:
  b.H0: versus Ha:
  c.H0: versus Ha:
  d.H0: versus Ha:

Question 2


 

If two independent random samples gave the following information, what are the estimated mean and standard error for the difference between the two means under the assumption of equal variances?
  Sample A: nA = 10, , sA = 15
  Sample B: nB = 20, , sB = 10


 

  a.The mean is 200 and the standard error is 12.5.
  b.The mean is 40 and the standard error is 11.84.
  c.The mean is 200 and the standard error is 4.59.
  d.The mean is 40 and the standard error is 4.59.


nmyers

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

correct: c

Answer to Question 2

correct: d


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