T-Test for Independent Samples by Groups - Quick Tab

Select the Quick tab of the T-Test for Independent Samples by Groups dialog box to access options to quickly review the results of an independent t-test.

For more advanced results, use the options on the Advanced tab.

Summary: T-tests

Click the Summary:T-tests button to compute the t-tests for independent samples and display the results in a spreadsheet.

The detail and formatting of the results depends on your selections in the Options tab.

Box & whisker plots

Click the Box & whisker plots button to produce a cascade of box and whisker plots for the dependent variables; one box plot for each variable will be produced.

Box and whisker plots summarize the distribution of the dependent variable for each group. Specifically, each group will be represented by one box and whisker component, which is made up of three parts:

• A central circle to indicate the mean;
• A box to indicate the mean plus/minus the standard error.
• Whiskers around the box to indicate the mean plus/minus 1.96*standard error (this gives an approximate 95% confidence interval for the mean).