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Over the last several years, the use of cell phones hasincreased drastically, The mean talking time for per monthfor cell phones was 372 minutes for men and 275 minutes for womenwhile the mean talking time per month for traditional homes was 334minutes for men and 510 minutes for women. Suppose that thepoll was based on a sample of 100 men and 100 women and thestandard deviation of the talking time per month for cell phoneswas 120 minutes for men and 100 for women, while the standarddeviation of the talking time per month for traditional home phoneswas 100 minutes for men and 150 for women.Use a level of significance of 0.05
a. Is there evidence of a difference in the mean monthly talking time on cell phones for men and women.
b. Is there evidence of a defference in the mean monthlytalking time for traditional home phones for men and women.
c. Construct and interpret a 95% confidence interval estimate of the difference in the mean monthly talking time on cellphones for men and women.
d. Construct and interpret a 95% confidence intervalestimate of the difference in the mean monthly talking time ontraditional home phones for men and women
e. Is there evidence of a difference in the variance ofthe monthly talking time on cell phones for men and women?
f. Is there evidence of a difference in the variance of themonthly talking time on traditional home phones for men andwomen.
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