To Find the Standard Deviation of the Diameter of Wooden $\sigma$

To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19 randomly selected dowels and finds the standard deviation of the sample to be s=0.16 . Find the 95 % confidence interval for the population standard deviation $\sigma$

A) $0.12 < \sigma < 0.24$
B) $0.15 < \sigma < 0.21$
C) $0.11 < \sigma < 0.25$
D) $0.13 < \sigma < 0.22$