Question: Calculate the two - sided 9 0 % confidence interval for the population standard deviation ( sigma ) given that a sample of size n

Calculate the two-sided 90% confidence interval for the population standard deviation (sigma) given that a sample of size n=15 yields a sample standard deviation of 9.21.
Your answer:
3.21 sigma 8.42
7.08 sigma 13.44
3.19 sigma 5.41
4.04 sigma 5.91
9.35 sigma 25.30
3.36 sigma 11.06
5.30 sigma 1.89
13.40 sigma 2.54
0.02 sigma 5.22
3.09 sigma 14.96
Calculate the two-sided 90% confidence interval for the population standard deviation

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