Summary statistics by group & quartile plots

Command syntax: MEANS <DV> <IV>

Report mean, standard deviation, and sample size of each group. Rounding rule for the mean and standard deviation is "measurement's precision +1". Also report selected points from a 5-point summary, as needed.

Side-by-side quartile plots drawn by hand are based on 5-point descriptive summaries (min, Q1, median, Q3, max). Measure of location is indicated by group medians. Measure of spread by group interquartile ranges (distances between whiskers). Symmetry by location of median within whiskers.