Salsberry Realty sells homes along the east coast of the United States. One of the questions most frequently asked by prospective buyers is: If we purchase this home, how much can we expect to pay to heat it during the winter? The research department at Salsberry has been asked to develop some guidelines regarding heating costs for single-family homes. To investigate, Salsberry's research department selected a random sample of 20 recently sold homes. Data can be found in SALSBERRY.a. Develop a 95% confidence interval for the mean heating costs for all single-family homes along the east coast.b. Interpret the interval constructed in part a

A B C Heating Cost Age of Furnace 2 250 6 360 10 165 43 92 200 355 290 10 230 120 5 73 4 205 1 400 15 15 320 16 72 17 272 18 94 19 190 20 235 Un CO H 21 189 22