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Author Question: We are interested in determining whether or not the variances of the sales at two small grocery ... (Read 94 times)

vicky

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on: Aug 1, 2018
We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 16 days of sales at each store indicated the following: Store A Store B n1 = 16 n2 = 16 s1 = 125 s2 = 105 Are the variances of the populations (from which these samples came) equal? Use  = .05.
  Indicate whether the statement is true or false

Question 2

A sample of 61 items provided a sample mean of 932, a sample mode of 900, and a sample standard deviation of 11 . Test the following hypotheses using  = .05 . What is your conclusion? H0: 2  80 Ha: 2 > 80


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polinasid

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Reply #1 on: Aug 1, 2018
Answer to Question 1

F = 1.42; do not reject H0, there is not sufficient evidence to conclude that the variance of the sales at two small grocery stores are different

Answer to Question 2

2 = 90.75 > 83.2976; reject H0, there is sufficient evidence to conclude that the population variance exceeds 80


vicky

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Reply #2 on: Aug 1, 2018
TY


polinasid

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Reply #3 on: Aug 1, 2018
You're welcome


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