Exercise C.70 gives computer output comparing mean commute time between males and females in the city of St. Louis. Use the data in CommuteAtlanta to see if a similar relationship (or lack of relationship) holds in Atlanta. Include both a confidence interval and test for the difference in mean commute time by gender in Atlanta.

Exercise C.70

Some computer output is shown on the next page from an analysis to compare mean commute time between males and females using data from St. Louis commuters in CommuteStLouis. Write a paragraph interpreting what this output shows about the relationship (if any) between commuting time and gender in St. Louis.

Difference = mu (F) - mu (M)

Estimate for difference: -0.70

95% CI for difference: (-3.20, 1.80)
T-Test of difference = 0 (vs not =): T-Value = -0.55 P-Value = 0.585 DF = 497

Two-sample I for Time Mean Sex StDev SE Mean 240 21.6 13.9 0.90 14.6 0.90 260 22.3