The t-test Report | JMP 13.2

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Basic Analysis • Oneway Analysis • Means/Anova and Means/Anova/Pooled t • The t-test Report

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The t-test Report

Note: This option is applicable only for the Means/Anova/Pooled t option.

There are two types of t-Tests:

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Equal variances. If you select the Means/Anova/Pooled t option, a t-Test report appears. This t-Test assumes equal variances.

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Unequal variances. If you select the t-Test option from the red triangle menu, a t-Test report appears. This t-Test assumes unequal variances.

The t-test report contains the following columns:

Shows the sampling distribution of the difference in the means, assuming the null hypothesis is true. The vertical red line is the actual difference in the means. The shaded areas correspond to the p-values.

Shows the estimated difference between the two X levels. In the plots, the Difference value appears as a red line that compares the two levels.

Shows the standard error of the difference.

Shows the upper confidence limit for the difference.

Shows the lower confidence limit for the difference.

Shows the level of confidence (1-alpha). To change the level of confidence, select a new alpha level from the Set α Level command from the platform red triangle menu.

Value of the t-statistic.

The degrees of freedom used in the t-test.

The p-value associated with a two-tailed test.

The p-value associated with an upper-tailed test.

The p-value associated with a lower-tailed test.

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Help created on 9/19/2017