To compare commuting times in various locations, independent random samples were obtained from the six cities presented in “The Morning Rush. ”The samples were from workers who commute to work during...

To compare commuting times in various locations, independent random samples were obtained from the six cities presented in “The Morning Rush. ”The samples were from workers who commute to work during he 8:00 a.m. rush hour.

a. Construct a graphic representation of the data using six side-by-side dot plots.

b. Visually estimate the mean commute time for each city and identify it with an X.

c. Does it appear that different cities have different effects on the average amount of time spent by workers who commute to work during the morning 8:00 a.m. rush hour? Explain.

d. Does it visually appear that different cities have different effects on the variation in the amount of time spent by workers who commute to work during the morning 8:00 a.m. rush hour? Explain.