Review Descriptive Statistics - Quick Tab

Select the Quick tab of the Review Descriptive Statistics dialog box to access the options described here. Use these options to review basic within group descriptive statistics.

Pooled within-groups covariances & correlations

Click this button to produce a spreadsheet with the pooled within-groups covariances for all variables, and another spreadsheet with the pooled within-groups correlations. A particularly useful Graph of Input Data for these spreadsheets is the scatterplot, which will be computed to reflect the pooled within-groups correlations. Specifically, the scatter plot will show the individual values in terms of their deviations from the respective group mean. In this plot, the variable on the horizontal axis actually represents deviations of the respective cases from the means of the variable in the respective groups to which the cases belong; in short, the two axes in the plot represent within-groups deviation scores (from the respective means).

Means & number of cases

Click this button to produce a spreadsheet with the means for each variable for each group; the last column of the spreadsheet will contain the number of cases in each group and the last row of the spreadsheet will contain the overall means (collapsed across all groups, i.e., the weighted means). A particularly useful Graph of Input Data for this spreadsheet is the histogram, which can be produced for all cases or for selected groups only. In all histograms, the normal distribution will be superimposed over the observed distribution.

Note: histogram for selected groups. To produce a histogram for a selected group, highlight (click with the mouse in the spreadsheet) the desired variable (column) and the desired group (row). Then right-click on that cell and select Graph of Input Data from the shortcut menu. In the Graph of Input Data menu, select the Histogram ... Normal fit option to produce this graph.

Note: histogram for all groups combined. To produce a histogram for all groups combined, highlight the desired variable (column) and highlight the last row (labeled All Grps). Then right-click on that cell and select Graphs of Input Data from the shortcut menu. In the Graph of Input Data menu, select the Histogram ... Normal fit option to produce this graph.