SOLUTION: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 146 with 63 successes. Enter your answer as an open-interv

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Question 1197541: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 146 with 63 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi 
  p(succes) = 63/146 = .4315  , p (failure) = .5685
95% CI   ⇒   z = 1.96   |  2-sided  Invnorm( .95 + .05/2) = Invnorm(.975)
ME = z%2Asqrt%28%28p%281-p%29%29%2Fn%29
Plug and Play
ME = 1.96%2A%28sqrt%28%28.4315%29%28.5685%29%29%2F146%29%29 = .0808
 .4315  ±  .0808
 CI(.351, .512)
Wish You the Best in your Studies.