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Basic Analysis > Oneway Analysis > Additional Examples of the Oneway Platform > Example of the Each Pair, Student’s t Test
Publication date: 04/21/2023

Example of the Each Pair, Student’s t Test

This example uses the Oneway platform to illustrate the use of all possible t tests.

1. Select Help > Sample Data Folder and open Big Class.jmp.

2. Select Analyze > Fit Y by X.

3. Select weight and click Y, Response.

4. Select age and click X, Factor.

5. Click OK.

6. Click the Oneway Analysis red triangle menu and select Compare Means > Each Pair, Student’s t.

Figure 6.13 Example of Each Pair, Student’s t Comparison Circles 

Example of Each Pair, Student’s t Comparison Circles

The means comparison method uses Fisher’s least significant difference (LSD) method to evaluate differences between individual pairs of means. The method does not maintain the error rate for simultaneous comparisons. For a large number of groups consider other comparison methods.

Figure 6.14 Example of Means Comparisons Report for Each Pair, Student’s t 

Example of Means Comparisons Report for Each Pair, Student’s t

In Figure 6.14, the LSD threshold table shows the difference between the absolute difference in the means and the LSD (least significant difference). If the values are positive, the difference in the two means is larger than the LSD, and the two groups are statistically significantly different.

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