Testing for a difference of means
Probably the most common statistical analysis is a test for a difference in the means of two groups. The Student's t-test is the most popular test.
- Open the file tutorials\Effect of Calcium on Blood Pressure.xlsx.
- Click a cell in the dataset.
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On the Analyse-it ribbon tab, in the
Statistical Analyses group, click
Compare Groups drop-down, and then click
Student t.
The analysis task pane opens.
- In the Y (response) variable list, select Decrease.
- In the X (factor) variable list, select Treatment.
- In the Significance level edit box, enter 5%.
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Click Calculate.
The results are calculated and the analysis report opens.
You can see the p-value of the hypothesis test is not significant at the 5% level. Therefore, do not reject the null hypothesis of no difference in the treatments.

Next topic: Testing assumptions of the t-test