To Find A $90 \%$ Confidence Interval for the Standard Deviation from a Small Sample

Multiple Choice

To find a $90 \%$ confidence interval for the standard deviation from a small sample, we use the values

A) $X_{0.90}^{2}$ and $X_{0.10}^{2}$ .
B) $X_{0.95}^{2}$ and $X_{0.05}^{2}$ .
C) $X_{0.975}^{2}$ and $X_{0.025}^{2}$ .
D) only $X_{0.90}^{2}$ .