Q:Question:interval for d. A loan officer compares the interest rates for 48 -month fixed-rate auto loans and 48 -month variable-rate auto loans. Two independent, random samples of auto loan rates are selected. A sample of five 48 -month variable rate auto loans had the following loan rates: [ 2.49 x 3.61 x 2.873 x 3.28 x 3.13 x ] while a sample of five 48 month fixed-rate auto loans had loan rates as follows:A:Answer:Ans (a) Hypotheses: Let be the mean rate for 48 mo...