Arecent gallup poll asked 1006 americans, "during the past year, about how many books, either hardcover or paperback, did you read either all or part of the way through? " results of the survey indicated that x = 13.4 books and s = 16.6 books. construct a 99% confidence interval for the mean number of books americans read either all or part of during the preceding year. interpret that interval.

The required interval is

Step-by-step explanation:

Consider the provided information.

It is given that:

n = 1006, mean = 13.4 and s = 16.6  

We need to construct a 99% confidence interval.

That means α = 0.01 and α/2 = 0.005

First find the standard error as shown:

Now to calculate confidence interval calculate:

Hence, the required interval is

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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