Compute the sample size necessary to draw statistically valid conclusions about a population from a dataset.
Find the sample size needed to estimate a binomial parameter:
Find the sample size needed to estimate a population mean:
Compute the confidence intervals for population statistics based on sample size or the characteristics of the data sample.
Compute a confidence interval for a binomial parameter:
Find a confidence interval for the difference between binomial parameters:
Compute a confidence interval for a population mean:
Find a confidence interval for the difference between population means:
Find a confidence interval for the standard deviation of a normal population:
Find a confidence interval for the variance of a normal population:
Test the validity of hypotheses and conjectures regarding statistical quantities derived from a sample of data.
Test for a binomial parameter:
Test for the difference between binomial parameters:
Test for a population mean:
Test for the difference between population means: