Use the Given Degree of Confidence and Sample Data to Construct

Multiple Choice

Use the given degree of confidence and sample data to construct a confidence interval for the population mean µ. Assume that the population has a normal distribution.
-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 ?.

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