Sample Size Calculator

The DSS Sample Size calculators allow researchers to determine the sample size needed for a particular problem whether looking at averages or percentages, one sample or two.

Find Sample Size Average

FInd Sample Size Percentage

Sampling Error Calculator

Once a study has been conducted, the DSS Sampling Error calculator indicates the sampling error for a particular confidence level. 

Find Sampling Error

Statistical Power Calculator

Use the DSS Statistical Power calculator to determine the beta error or statistical power for a given sample or samples. Both one-tail and two-tail tests can be performed on averages and percentage values.

Find Statistical Power Average

Find Statistical Power Percentage

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