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Please round to 4 decimal places A sample of 20 items provides a sample standard deviation of 6. (A). Compute the 90% confidence interval estimate

Please round to 4 decimal places A sample of 20 items provides a sample standard deviation of 6.

(A). Compute the 90% confidence interval estimate of the population standard deviation.

(B). Compute the 95% confidence interval estimate of the population variance

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