correct interpretation, Ch.13 section 13.5, Appendix F Q2 - five misconceptions, Ch.13 section 13.6 paired t-test, **Ch.16 section 16.4** - `stats.ttest_rel()`, Ch.16 section 16.9 `pandas`, **Ch.3 section 3.4**, Appendix B section B.2 parameter, **Ch.2 section 2.4** `pd.crosstab()`, Ch.8 section 8.7