Find the 95% Confidence Interval for the Variance of the Heights

question 61

Multiple Choice

Find the 95% confidence interval for the variance of the heights of maple trees if a sample of 12 trees has a standard deviation of 10 feet.

• A) \(11.0 < \sigma ^ { 2 } < 9.0\)
• B) \(7.0 < \sigma ^ { 2 } < 17.5\)
• C) \(89.0 < \sigma ^ { 2 } < 111.0\)
• D) \(48.8 < \sigma ^ { 2 } < 308.0\)

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