# Explore Plots

**Boxplots.** These alternatives control the display of boxplots when you have
more than one dependent variable. Factor
levels together generates a separate display for each
dependent variable. Within a display, boxplots are shown for each
of the groups defined by a factor variable. Dependents together generates a separate display for
each group defined by a factor variable. Within a display, boxplots
are shown side by side for each dependent variable. This display is
particularly useful when the different variables represent a single
characteristic measured at different times.

**Descriptive.** The Descriptive group allows you to choose stem-and-leaf plots and
histograms.

**Normality plots
with tests.** Displays normal probability and detrended
normal probability plots. The Kolmogorov-Smirnov statistic, with a
Lilliefors significance level for testing normality, is displayed.
If non-integer weights are specified, the Shapiro-Wilk statistic is
calculated when the weighted sample size lies between 3 and 50. For
no weights or integer weights, the statistic is calculated when the
weighted sample size lies between 3 and 5,000.

**Spread vs. Level
with Levene Test.** Controls data transformation for spread-versus-level
plots. For all spread-versus-level plots, the slope of the regression
line and Levene's robust tests for homogeneity of variance are displayed.
If you select a transformation, Levene's tests are based on the transformed
data. If no factor variable is selected, spread-versus-level plots
are not produced. Power estimation produces a plot of the natural logs of the interquartile ranges
against the natural logs of the medians for all cells, as well as
an estimate of the power transformation for achieving equal variances
in the cells. A spread-versus-level plot helps to determine the power
for a transformation to stabilize (make more equal) variances across
groups. Transformed allows you
to select one of the power alternatives, perhaps following the recommendation
from power estimation, and produces plots of transformed data. The
interquartile range and median of the transformed data are plotted. Untransformed produces plots of the raw
data. This is equivalent to a transformation with a power of 1.

Specifying Plots for Explore

This feature requires the Statistics Base option.

- From the menus choose:
- In the Explore dialog box, select Both or Plots in the Display group to enable the Plots button.
- Click Plots and select at least one plot.