Given the values of $\bar { x } , \mathrm {~s}$, and $\mathrm { n }$, form a $99 \%$ confidence interval for $\sigma ^ { 2 }$. $\overline { \mathrm { x } } = 15.1 , \mathrm {~s} = 4.3 , \mathrm { n } = 24$
A) $( 10.04,47.92 )$
B) $( 9.63,45.92 )$
C) $( 10.21,41.71 )$
D) $( 2.38,9.7 )$

Question

Quizplus · Accepted Answer

The confidence interval for $\sigma^2$ is calculated using the chi-square distribution with $(n-1)$ degrees of freedom. The correct interval is $( 9.63,45.92 )$.

Given the Values Of xˉ, s\bar { x } , \mathrm {~s}xˉ, s

Given the Values Of $\bar { x } , \mathrm {~s}$