Brand loyalty in the automotive industry can be measured by the percentage of brand owners who purchase again. Suppose Cars.com would like to investigate if there is a difference in brand loyalty between Chevrolet and Buick owners. A random sample of 160 Chevrolet owners found that 68 had previously owned a Chevrolet. A random sample of 150 Buick owners found that 76 had previously owned a Buick. ,a. Using ? = 0.05, perform this hypothesis test for Cars.com.,b. Construct a 95% confidence interval to estimate the difference in the proportion of owners who purchased the same brand of car for these two populations. Interpret your result. ,c. Determine the p value and interpret the results.

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now