Question: A random sample of 20 observations is selected from a normally distributed population. The sample variance is 12. In the 95% confidence interval for the

A random sample of 20 observations is selected from a normally distributed population. The sample variance is 12. In the 95% confidence interval for the population variance, the upper limit will be:

Group of answer choices

6.940

7.564

22.536

25.599

27.392

As the degrees of freedom for thetdistribution increase, the distribution approaches the:

Group of answer choices

chi-square distribution

Fdistribution

zdistribution

normal distribution with= 0 and²= 0.5

none of these

note: for the second question when i choose option d)normal distribution with..... it said it is wrong

what is the correct option?

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