Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 216 with 76% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. C.I. =

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Asked Nov 19, 2019
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Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 216 with 76% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.

 

C.I. = 

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Expert Answer

Step 1

Introduction:

The 100 (1 – α) % confidence interval for the population proportion, p is: (– (/2­) (p (1 – p)/n), + (/2­) (p (1 – p)/n)).

Here, n is the sample size, is the sample proportion, and /2 is the critical value of the z-distribution, above which, 100 (...

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