# Power Analysis for a Two-Sample t-Test

Power Analysis for a Two-Sample t-Test

A -test examines a statistical hypothesis following a Student distribution under the null hypothesis. The object is to estimate the mean of a normal distribution for small sample size and unknown standard deviation. The -test can be used to determine if two sets of data are significantly different from one other. This Demonstration provides a visual representation for calculating power in a two-sample -test. Use the sliders to manipulate effect size, sample size and the -value to see how they affect the power in hypothesis testing. The area of the blue shaded region represents the power.

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