Question: Brand loyalty in the automotive industry can be measured by

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 α = 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.



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  • CreatedJuly 17, 2015
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