Question: A sample of 18 observations selected from a normally distributed population produced a sample variance of 4.6.
a. Write the null and alternative hypotheses to test whether the population variance is different from 2.2.
b. Using α = .05, find the critical values of χ2. Show the rejection and nonrejection regions on a chi-square distribution curve.
c. Find the value of the test statistic χ2.
d. Using the 5% significance level, will you reject the null hypothesis stated in part a?