Test For Proportions Minimum Sample Size. Please select type the the significance level alpha and the required margin of error E along with an estimate of the population proportion if one exists and the solver will find the minimum sample size required. P 0 is the comparison value.
In order to construct a 95 confidence interval with a margin of error of 4 we should obtain a sample of at least n 601. Φ 1 is the standard Normal quantile function. If the comparison proportion is 0085 and the sample sizes are 500 and 1000 then the power of the test is approximately 045 and 07 for each sample size respectively.
Since p 1 - p attains maximum at p 12 a conservative estimate for sample size is.
Example was defined and all possible orders investigated only for the minimum example. Φ 1 is the standard Normal quantile function. In order to construct a 95 confidence interval with a margin of error of 4 we should obtain a sample of at least n 601. α is Type I error.
