A sample of 22 observations selected from a normally distributed population produced a sample variance of 18.

Question:

A sample of 22 observations selected from a normally distributed population produced a sample variance of 18.
a. Write the null and alternative hypotheses to test whether the population variance is different from 14.
b. Using α = .05, find the critical values of x2. Show the rejection and non-rejection regions on a chi-square curve.
c. Find the value of the test statistic x2.
d. Using a 5% significance level, will you reject the null hypothesis stated in part a?
Distribution
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