Descriptive Statistics
Creates basic descriptive statistics, such as means, medians, standard deviations, quartiles, etc. for all continuous variables; frequency tables and histograms for all categorical (class) and continuous variables. At Level of Detail = Comprehensive, Skewness, Kurtosis, Mode, etc. are also computed. When All results is requested, the program also reports normal expected frequencies, Kolmogorov-Smirnorov and Lilliefors Tests for Normality, Shapiro-Wilk's W Test for continuous variables, and normal probability plots. For frequency tables and histograms you can specify the method of categorization, and/or the number of intervals to use for tabulating the continuous variables. For categorical variables with specific codes, the frequency tables and histograms will be computed using those codes.
| Element Name | Description |
|---|---|
| General | |
| Detail of computed results reported | Detail of results reported. If the Comprehensive level of detail is selected, additional descriptive statistics are reported (e.g., Mode, Skewness, etc.); when All results is selected various graphs are also computed. |
| Creates medians | Choose whether to compute medians; note that computing medians may require significant computing resources for huge data sets. |
| Creates quartiles | Choose whether to compute the lower and upper quartile values (25th and 75th percentile values). |
| Type of categorization | Specifies the method of categorization of the values in the histogram for the selected variable(s). |
| Number of Intervals | Use this option to specify the number of categories for histograms and frequency tables; only used when the Type of categorization is set to Number of categories. |