How To Calculate Estimate Population Proportion. P′ = x / n where x represents the number of successes and n represents the sample size. Consult a unit normal table to find the proportion of the area under the normal curve falling to.
The sample proportion from a random sample can be used to estimate a population proportion. Interval estimate of population proportion after we found a point sample estimate of the population proportion , we would need to estimate its confidence interval. We know that estimates arising from surveys like that are random quantities that vary from sample.
