A sample of certain observations selected from a normally distributed population produced a sample variance of 38. Construct a 98% confidence interval for the population variance for each of the following cases and comment on the intervals as the sample size increases. (а) п — 12 (b) п — = 16 (с) п — 20 (а) п — 12

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6. A sample of certain observations selected from a normally distributed population produced a sample
variance of 38. Construct a 98% confidence interval for the population variance for each of the
following cases and comment on the intervals as the sample size increases.
(а) п — 12
() п — 16
(с) п — 20
(а) п — 12
Transcribed Image Text:6. A sample of certain observations selected from a normally distributed population produced a sample variance of 38. Construct a 98% confidence interval for the population variance for each of the following cases and comment on the intervals as the sample size increases. (а) п — 12 () п — 16 (с) п — 20 (а) п — 12
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