Answer
We are $90\%$ confident that the proportion of cars made in Japan is between $0.29938661$ to $0.46984416$.
Work Step by Step
According to the computer output, the $90\%$ confidence interval is: $0.29938661$ to $0.46984416$.
This means that we are $90\%$ confident that the proportion of cars made in Japan is between $0.29938661$ to $0.46984416$.
