t-Test: Two-Sample Assuming Unequal Variances Tool Graphics: Images, Widgets, and Drawings

z-Test: Two Samples for Means Tool

Figure 8-92 z-Test Tool Dialog Options

For unpaired variables with known population variances, enter those variances in the “Variable 1 Pop. Variance” and “Variable 2 Pop. Variance” entries. When you click on “OK”, Gnumeric will test whether the mean of the difference between the paired variables is equal to the given hypothesized mean difference.

Example 8-21 Using the z-Test Tool

See Figure 8-93 for an example of a completed dialog and Figure 8-94 for the corresponding output.

Figure 8-93 z-Test Example Data
Figure 8-94 Output from the z-Test Tool
t-Test: Two-Sample Assuming Unequal Variances Tool Graphics: Images, Widgets, and Drawings