A clinic compared healthy dogs it owned with healthy pets brought to clinic to be neutered. The summary statistics for blood cholesterol levels (milligrams deciliter of blood) appear in the following table: Types Pets (P) Clinic (C) n 61 61 Difference (d = P- 61 C) Average Standard deviation 198 173 25.0 66.1 46.8 53.0 (a) Find an 80% confidence interval for the difference in mean blood cholesterol levels dogs brought to the clinic (P) and dogs owned by the clinic (C). (Round your answers to 4 decimal places, if needed.)