Question: Referring to Exercise 9.21 , construct a 95% confidence interval for the population standard deviation of the diameters of Indian mounds. Data from in Exercise

Referring to Exercise 9.21 , construct a 95% confidence interval for the population standard deviation of the diameters of Indian mounds.

Data from in Exercise 9.21

The following measurements of the diameters (in feet) of Indian mounds in southern Wisconsin were gathered by examining reports in Wisconsin Archeologist ( courtesy of J. Williams).

22 24 24 30 30 24 34 36 22 15 20 37

22 24 24 30 30 24 34 36 22 15 20 37 28

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