Question

Use technology to construct the confidence intervals for the population variance sigma squared and the population...

Use technology to construct the confidence intervals for the population variance sigma squared and the population standard deviation sigma . Assume the sample is taken from a normally distributed population.

cequals 0.95​, sequals 38​, nequals 20

The confidence interval for the population variance is ​( ​). ​(Round to two decimal places as​ needed.)

The confidence interval for the population standard deviation is ​( ​). ​(Round to two decimal places as​ needed.)

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Answer #1

The statistical software output for this problem is:

Hence,

95% confidence interval for population variance = (835.13, 3080.44)

95% confidence interval for population standard deviation = = (28.90, 55.50)

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