38. 0 Marathon start-up years 2016 When we considered the Boston Marathon in Exercise 37 El, we were unable to check the Nearly Normal Condition. Here's a histogram of the differences: 20 15 10 30 105 FWheelChair-MFiunners (mins) The three largest differences are in the first three years of wheelchair competition: 1977, 1978, and 1979. Often the start-up years of new events are different; later on, more athletes train and compete. If we omit those three years, the summary statistics change as follows: Sunnary of wheelchrF runM 11 = 37 Mean = 15.29 SD = 18.14 a. Comment on the assumptions and conditions. b. Assuming that these times are representative of such races, construct and interpret a 95% confidence interval for the mean difference in finishing time. 0. Would a hypothesis test at = 0.05 reject the null hypothesis of no difference? What conclusion would you draw