To compare commuting times in various locations, independent random samples were

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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
  • Construct a graphic representation of the data using six side-by-side dotplots.
  • Visually estimate the mean commute time for each city and locate it with an X.
  • Does it appear that different cities 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.
  • 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 8:00 a.m. rush hour? Explain.

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