14. Marathon Times Listed below are New York Marathon running times (in seconds)

for randomly selected runners who completed the marathon. Are the running times 664 Chapter 12 Analysis of Variance affected by an interaction between gender and age bracket? Are running times affected by gender? Are running times affected by age bracket?

Times (in seconds) for New York Marathon Runners Age 21–29 30–39 40 and over Male 13,615 14,677 14,528 18,784 16,090 17,034 14,256 14,086 14,935 10,905 16,461 14,996 12,077 20,808 22,146 Female 16,401 15,357 17,260 14,216 16,771 25,399 15,402 15,036 18,647 15,326 16,297 15,077 12,047 17,636 25,898 12-3 BEYOND THE BASICS