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The ratio t test compares the means of two matched groups, assuming that the distribution of the raw data follow a lognormal distribution.

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Results of nested t test. The 95% confidence interval for the difference between control and treated means range sfrom -2.3 to 15.9. The P value ...

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The paired t test compares the means of two matched groups, assuming that the distribution of the before-after differences follows a Gaussian distribution.

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The lognormal t test compares the geometric means of two groups. If the geometric means of both groups are the same, then this ratio will equal 1.

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Prism computes an unpaired t test for each row, and reports the corresponding two-tailed P value. There are two ways it can do this calculation.

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t tests, Mann-Whitney and Wilcoxon matched pairs test. Running a t test (or related nonparametric test); Unpaired t test and Lognormal t test; Paired or ratio t ...

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Click on the Column tab. Then choose to use sample data, and choose the sample data for an unpaired t test. Welcome Dialog t test sample.

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You've measured a variable in two groups, and the means (and medians) are distinct. Is that due to chance? Or does it tell you the two groups are really ...

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The unequal-variance t test computes the number of df using a complicated equation that can end up with a fractional df. Prism 5 rounds this value down to the ...

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