(Solved):
6. A random sample of size \( n=15 \) taken from a normally-distributed population is found to hav ...
6. A random sample of size \( n=15 \) taken from a normally-distributed population is found to have a sample variance of \( 5.2 \). The lower bound of the \( 90 \% \) confidence interval for the population standard deviation is: (A.) \( 1.670 \) (B.) \( 1.753 \) (C.) \( 3.074 \) (D.) \( 3.329 \) (E.) \( 11.079 \)