SOLUTION: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 267 with 166 successes. Enter your answer as an open-inter
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Question 1088909: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a sample of size 267 with 166 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.
98% C.I. =
Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! CI0.98)=phat +/- 2.326 *sqrt (p(1-p))/n
=0.622+/- 2.326 * sqrt (0.622*0.378)/267; sqrt term is 0.0297; product is 0.069
interval is (0.553, 0.691)
