Descriptive Statistics - Quick Tab

Select the Quick tab of the Descriptive Statistics dialog box to access options to review a default selection of descriptive statistics as well as to review graphs which aid in discovering the distribution of the selected variables.

Summary: Statistics

Click this button to produce a spreadsheet with the descriptive statistics for all of the previously selected variables (via the Variables button).

You can request specific descriptive statistics on the Advanced tab.

Graphs 1

Click this button to produce a compound graph for each selected variable consisting of a histogram, normal probability plot, box plot, and descriptive statistics.

This is a quick way to visually see the distribution of the data.

Graphs 2

Click this button to produce a compound graph for each selected variable consisting of a histogram, horizontal box plot, and descriptive statistics.

This compound graph has more descriptive statistics such as variance, skewness and 95% Prediction for Observation.

Frequency tables

Click this button to produce a cascade of spreadsheets with the frequency distributions for the selected variables (one spreadsheet per variable).

The manner in which the selected variables are categorized depends on the selections made in the Categorization group box (on the Normality tab). Note that an extensive selection of categorization methods and frequency table statistics are available in the Frequency tables analysis.

Histograms

Click this button to produce a cascade of histograms, analogous to the Frequency tables.

If Normal expected frequencies (on the Normality tab) is selected, the histograms also display the normal curve, superimposed over the observed frequencies.

Box & whisker plot for all variables

Click this button to produce a box and whisker plot for the selected variables.

 The box and whisker plot summarizes each variable by three components:

• A central circle to indicate the mean;
• A box to indicate the mean plus/minus the standard deviation.
• Whiskers around the box to indicate the mean plus/minus 1.96*standard deviation (hence if your data follows the normal distribution, 95% of your data should fall within the whiskers).

Graphical comparative summary display

Click this button to display up to six variables on one graph, a quick way to create a summary graphical document that enables easy comparison between variables.

 A histogram, box plot and descriptive statistics are produced per variable. The histogram and box plot use the same scale.