In a certainmarathon, there has been a wheelchair division for the past 15 years. A researcher would like to know who is typicallyfaster, themen's marathon winner on foot or thewomen's wheelchair marathon winner. Because the conditions differ from year toyear, and speeds have improved over theyears, it seems best to treat these as paired measurements. The summary statistics for the pairwise differences in finishing time(in minutes) are shown below.

Summary of wheelchrF runM

N=15

Mean= 2.67

SD= 38.891

Assuming that these times are representative of such races and the differences appeared acceptable forinference, construct and interpret a 90% confidence interval for the mean difference in finishing times.

The confidence interval is __ and __ minutes.