Confidence Interval for Proportions Summary

Confidence Intervals for Proportions


there are many times when a proportion from a population is required.

to estimate π, a proportion from a population, the proportion from a sample, p, can be used as a point estimate of π

as with estimating the mean, a range of values with some level of probability or confidence that the population parameters will lie within this range is a better way to estimate the population proportion.

this range of values is called a confidence interval for proportions.

Key Skills

find a confidence interval, at various degrees of confidence, for a population proportion.


confidence intervalpoint estimatepopulationmean, standard deviation.