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How can I do this on TI-84 Calculator Use technology to construct the confidence intervals for...

How can I do this on TI-84 Calculator Use technology to construct the confidence intervals for the population variance sigmasquared and the population standard deviation sigma. Assume the sample is taken from a normally distributed population. cequals0.95​, ssquaredequals7.84​, nequals28 The confidence interval for the population variance is ​( nothing​, nothing​).

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Homework Answers

Answer #1

n = 28

s2 = 7.84

= 0.05

ndf = n - 1 = 28 - 1 = 27

Confidence Interval:

Low End:

Using the function CHIINV(0.025,27) in TI-84 Calculator:

Low End:

High End:

Using the function CHIINV(0.975,27) in TI-84 Calculator:

So,

Confidence interval for population variance is:

(4.9006, 14.5251)

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