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Confidence interval for the population standard deviation

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Reference no: EM132461610

The scores on an ACT exam are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination.403, 418, 469, 493, 541, 559, 606 Send data to Excel

Find a 90% confidence interval for the population standard deviation.

Carry your intermediate computations to at least three decimal places.

What is the lower limit of the 90% confidence interval?

What is the upper limit of the 90% confidence interval?

Reference no: EM132461610

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