Question: Recall Example 8.6, where Jared Beane wants to construct a 90% confidence interval of the proportion of all ultra-green cars that obtain over 100 mpg.

Recall Example 8.6, where Jared Beane wants to construct a 90% confidence interval of the proportion of all ultra-green cars that obtain over 100 mpg. Jared does not want the margin of error to be more than 0.10. How large a sample does Jared need for his analysis of the population proportion?

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