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 n Average Standard deviation Pets (P) 51 195 60.5 Clinic (C) 51 180 42.7 Difference (d = P - C) 51 15.0 47.4 (a) Find a 98% 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.) (-9.4577 39.4577 Your last answer was interpreted as follows: 9.4577 Your last answer was interpreted as follows: 39.4577 (b) Based on this confidence interval, can we conclude there is some differences in mean blood cholesterol levels between the two groups? O No, since the interval is completely above 0. O Yes, since the interval is completely above 0. O No, since the interval contains 0. O Yes, since the interval contains 0