* do-file for Supplementary Exercise 10.33 of IPS7e
version 15 /* works also with versions 13-14 */

import delimited "R:\Chapter 10\ex10_033.csv"
summarize retinol crp, d
twoway (scatter retinol crp) (lfit retinol crp)
regress retinol crp
predict stdres, rstandard
qnorm stdres
histogram stdres
predict fit
scatter stdres fit