Chapter 19, Problem 9E

To determine

To explain carefully what it tells you.

Explanation of Solution

It is given in the question that what fraction of cars is made in Japan. The computer output of the following information gives the results for the same. Thus, it means that on the basis of this ample, we are $\text{90\%}$ confident that the proportion of Japanese cars is between $\text{22}\text{.9\% and 47\%}$ as given in the confidence interval of the computer output about the cars.