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

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

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

One-Way Travel to Work in Minutes Atlanta Boston Dalls Philadelphia Seattle St. Louis 29 21 20 18 37 37 25 32 34 48 42 25 36 32 20 26 35 29 20 30 23 31 39 14 15 24 42 23 37 26 37 42 18