In order to estimate the difference between the average mile

In order to estimate the difference between the average miles ran per week by elite marathon runners living in the US and Kenya, the following data was collected US n1=48 xbar1=75 s1=20 Kenya n2= 44 xbar2= 90 s2= 15 a. Develop an interval estimate for the difference between the average miles ran by runners in the US and Kenya, using =.01. b. Find the test statistic necessary for this type of data.