Determine the sample size necessary to construct a 90% confidence interval with an error of 0.07 if the sample proportion is p̂ = 0.195. n = Determine the sample size necessary to construct an 85% confidence interval with an error of 0.58 if the population standard deviation is known to be σ = 9.29. n =
Added by Sandra M.
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07 and the confidence level to be 90%. From a standard normal distribution table, we know that the z-score for a 90% confidence level is 1.645. Plugging in the values we have: 0.07 = 1.645 * sqrt(ˆpp^*(1-ˆpp^)/n) Solving for n: n = (1.645^2 * ˆpp^*(1-ˆpp^)) / Show more…
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