!$ \begin{bmatrix} {(n - 1) \hat{\sigma}^2 \over \chi^2 inf} < \sigma^2 < {(n - 1) \hat{\sigma}^2 \over \chi^2 sup}\end{bmatrix} = p \% !$

!$ \begin{bmatrix} {(n - 1) \hat{\sigma}^2 \over \chi^2 inf} < \sigma^2 < {(n - 1) \hat{\sigma}^2 \over \chi^2 sup}\end{bmatrix} = (1 - p) \% !$

!$ \begin{bmatrix} {(n - 1) \hat{\sigma}^2 \over \chi^2 sup} < \sigma^2 < {(n - 1) \hat{\sigma}^2 \over \chi^2 inf}\end{bmatrix} = p \% !$

!$ \begin{bmatrix} {(n - 1) \hat{\sigma}^2 \over \chi^2 inf} < \sigma^2 < {(n - 1) \hat{\sigma}^2 \over \chi^2 sup}\end{bmatrix} = p \% !$

!$ \begin{bmatrix} {(n - 1) \hat{\sigma}^2 \over \chi^2 sup} < \sigma^2 < {(n - 1) \hat{\sigma}^2 \over \chi^2 inf}\end{bmatrix} = (1 - p) \% !$