### Free Educational Resources

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4 Tutorials that teach Test Statistic

# Test Statistic

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##### Description:

This lesson will explain test statistics.

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Tutorial

## Test-Statistic

Source: Image of P-value graph p-value Graph, Creative Commons: p-value graph: http://en.wikipedia.org/wiki/File:P-value_Graph.png

## Video Chapters

Terms to Know
Critical Value

A value that can be compared to the test statistic to decide the outcome of a hypothesis test

P-value

The probability that the test statistic is that value or more extreme in the direction of the alternative hypothesis

Test Statistic

A measurement, in standardized units, of how far a sample statistic is from the assumed parameter if the null hypothesis is true

Formulas to Know
Test Statistic

z-statistic of Means

z-statistic of Proportions