Graphic representation of the data

Question

To compare commuting times in various locations, independent random samples were obtained from the six cities presented in the "Longest Commute to Work" graphic on page 255 in your textbook. The samples were from workers who commute to work during the 8:00 a.m. rush hour. One-way Travel to Work in Minutes

Atlanta	Boston	Dallas	Philadelphia	Seattle	St. Louis
29	18	42	29	30	15
21	37	25	20	23	24
20	27	26	33	31	42
15	25	32	37	39	23
37	32	20	42	14	33
26	34	26			18
	48	35

1. Construct a graphic representation of the data using six sid-by-side dotplots.
2. Visually estimate the mean commute time for each city and locate it with an X.
3. Does it appear that different citites have different effects on the average amount of time spent by workers who commute to work during the 8:00 a.m. rush hour? Explain.
4. Does it visually appear that different cities have different effects on the variation in the amount of time spent by workers wo commute to work during the 8:00 a.m. rush hour? Explain.