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Assume that a sample is used to estimate a population proportion p. Find the 90% confidence...

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 248 with 84 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.

90% C.I. = _______________________

Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

Math   Statistics-And-Probability   
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