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

Multiple Choice

Given the values of $\bar { x } , \mathrm {~s}$ , and $n$ , form a $99 \%$ confidence interval for $\sigma$ . $\overline { \mathrm { x } } = 19.7 , \mathrm {~s} = 4.8 , \mathrm { n } = 14$

A) $( 3.17,9.17 )$
B) $( 10.04,84.02 )$
C) $( 3.29,8.54 )$
D) $( 2.09,17.5 )$