<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />I routinely perform ttests on unpaired and independent data sets. The dropdown in the oneway analysis report allows you to select for paired ttest. I am aware of the ANOM feature, but would still like to perform a ttest on independent data. Does JMP provide this feature.
Hi dmahan1,
The t-test options available in Fit Y by X (with a nominal X and continuous Y) are all for independent samples (both Means/ANOVA, and t-test compute independent samples t-test, assuming equal variance and not assuming equal variance respectively). The options under "Compare Means" are not for paired tests, but for pair-wise tests (comparisons of pairs of means, treated as independent samples). For independent measures tests, data must be arranged to have a single column for the response variable, and another variable (nominal) that identifies groups. For example:
Name Final Exam Training Group
John 87 Experimental
Timmy 76 Experimental
Gloria 88 Control
...
For paired t-tests, you can use the "Matched Pairs" platform. For this platform data must be arranged to have paired observations in two columns. For example:
Name Test 1 Test 2
John 15 20
Timmy 25 28
Gloria 31 32
I hope this helps!
Julian
