* do-file for Extra Exercise 19
version 17 /* works also with versions 13-16 */

import delimited "R:\Chapter 7\ex07_102.csv"
bysort group2: sum r, detail
bysort group2: swilk r
oneway r group2, tabulate bonferroni

* addendum: Levene's test for equal variance (W50 in the listing)
robvar r, by(group2)