Finding Sample Size For Estimating A Population Proportion. Adjusts sample sizes for finite population and clustering. This is the point estimate of the population proportion.
This utility calculates the sample size required to estimate a proportion or prevalence with a specified level of confidence and precision. Educated guess estimate p by p. This is the point estimate of the population proportion.
Population Sample Size n Z 2 x P 1 - P e 2 Where Z Z Score of Confidence Level P Expected Proportion e Desired Precision N Population Size For small populations n can be adjusted so that n adj Nxn Nn.
So the margin of error is the following. Use the given data to find he minimum sample size required to estimate the population proportion. In this video we discuss how to calculate or determine the minimum sample size needed to construct a confidence interval for a population proportion. When we use a normal model for the sampling distribution 95 of sample proportions estimate the population proportion within approximately 2 standard errors.
