Question
Assume that a sample is used to estimate a population proportion p. Find the 99% confidence...
Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 144 with 34% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.
99% C.I. =
Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.
Answers
Ans:
99% confidence interval for true proportion
=0.34+/-2.576*sqrt(0.34*(1-0.34)/144)
=0.34+/-0.102
=(0.238, 0.442)
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