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Dr Herschel Knapp introduces the paired t-test. The paired t-test measures a single group twice, before and after a treatment, to determine if there is a statistically significant change. For example, Knapp uses the paired t-test to determine if a treatment for depression is effective.

t-test (Statistics)

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Jason Gibson explains the statistical concept of t-distribution. He demonstrates how to use t-distribution when the degrees of freedom are less than 31.

t-test (Statistics)

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In chapter 12 of his series of statistics for psychology, Professor Daniel Little begins a three-part section on t-tests. Little discusses z-values and analysis using a single sample of data.

Psychology --- t-test (Statistics) --- Statistical methods. --- Research

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In this fourteenth chapter of the series on statistics for psychology, Professor Daniel Little concludes his discussion of t-tests. Little demonstrates how to compare data that come from the same population under different circumstances.

Psychology --- t-test (Statistics) --- Statistical methods. --- Research

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Professor Herschel Knapp continues his nursing statistics tutorials with a discussion of t-tests. He uses two groups of variables to compare the effectiveness of different medications and demonstrates how to process the data in SPSS.

Nursing --- Research --- t-test (Statistics) --- Statistical methods.