11. In order to determine whether or not there is a significant difference betwe

Question

11. In order to determine whether or not there is a significant difference between the average weekly wages of men and women, the following data have been accumulated.

  Men                                Women

Sample size 80                                            60

Sample mean $934                                    $756

Population standard deviation $190                                      $260

b. Find the test statistic when testing to see if there is a difference in the hourly wages for men and women.

Explanation / Answer

alpha / 2 = 0.05 Z= 1.64

I: 934 - 756 +/- 1.64 *srqt ( 190^2 /80 + 260^2 / 60 )

178 +/- 65.15

112.85 < miu1-miu2 < 243.15

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