The following is a 90% confidence interval for p: (.26,

Chapter 6, Problem 63E

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QUESTION:

The following is a 90% confidence interval for p: (.26, .54). How large was the sample used to construct this interval?

Questions & Answers

QUESTION:

The following is a 90% confidence interval for p: (.26, .54). How large was the sample used to construct this interval?

ANSWER:

Solution :

Step 1 of 1:

Our goal is :

We need to find how large was the sample used to construct this interval.

Given a 90% confidence interval for p:(0.26, 0.54).

Now we have to find how large was the sample used to construct this interval.

We know that level of significance

Then,

Using the normal distr

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