20260118 - fix subscripts

Author: isaactpetersen

sem.qmd

@@ -2667,7 +2667,7 @@ The standard error of the slope of the predictor on the outcome at different lev
 
 $$
 \begin{aligned}
-SE(\text{slope}_\text{predictor}) &= \sqrt{Var(b_1) + Var(b_3) \cdot Z^2 + 2 \cdot Z \cdot Cov(b1, b3)} \\
+SE(\text{slope}_\text{predictor}) &= \sqrt{Var(b_1) + Var(b_3) \cdot Z^2 + 2 \cdot Z \cdot Cov(b_1, b_3)} \\
 SE(b_1 + b_3 \cdot Z) &=
 \end{aligned}
 $$
@@ -2682,7 +2682,7 @@ The variance of a weighted sum is:
 
 $$
 \begin{aligned}
-Var(\text{slope}_\text{predictor}) &= Var(b_1) + Var(b_3) \cdot Z^2 + 2 \cdot Z \cdot Cov(b1, b3) \\
+Var(\text{slope}_\text{predictor}) &= Var(b_1) + Var(b_3) \cdot Z^2 + 2 \cdot Z \cdot Cov(b_1, b_3) \\
 Var(b_1 + b_3 \cdot Z) &=
 \end{aligned}
 $$