Statistical inference is the application of statistical methods to a set of data in order to infer conclusions about the data sample drawn from a population. Use Wolfram|Alpha's powerful algorithmic know-how to compute the validity of hypotheses, the sample size required to draw valid conclusions and the confidence intervals for various inferred population statistics.
Sample Size Determination
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: