by the k th random effect is 7\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$\begin{array}{@{}rcl@{}} \hat{\sigma}^{2}_{\alpha_{k}} /\hat{\sigma}^{2}_{Total}, \end{array} $$ \end{document}σ^αk2/σ^Total2,
