fully delivered in Sections 13.5-13.6 - ✅ **"What 'statistically significant' means"** — fully delivered in Section 13.7 - 🔄 **"Daria's shooting analysis"** — partially resolved (formal test, $z = 1.22$, $p = 0.111$, fail to reject at $\alpha = 0.05$; full two-sample test framework in Chapter 16; po