* do-file for Supplementary Exercises 2.2 and 10.7 of IPS7e
version 15 /* works also with versions 13-14 */

import delimited "R:\Chapter 2\ex02_002.csv"
scatter round2 round1
pwcorr round1 round2, sig
pwcorr round1 round2 if player~=8, sig
* extra question
pwcorr round1 round2 if player~=7, sig
pwcorr round1 round2 if player~=7 & player~=8, sig