Question: Calculate the two - sided 9 5 % confidence interval for the population standard deviation ( sigma ) given that a sample of size n

Calculate the two-sided 95% confidence interval for the population standard deviation (sigma) given that a sample of size n=20 yields a sample standard deviation of 2.92.
Your answer:
2.86 sigma 8.30
4.003.31
1.83 sigma 7.90
2.22 sigma 4.26
1.63 sigma 6.82
1.11 sigma 3.87
0.24 sigma 7.74
3.99 sigma 5.34
0.88 sigma 8.27
1.56 sigma 1.83
Calculate the two-sided 95% confidence interval for the population standard deviation

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