1. It has been suggested that night shift-workers show more variability in their output levels than day workers. Below, you are given the results of two independent random samples. Assume the output levels are normally distributed. Night Shift Day Shift Sample Size 9 8 Sample Mean 520 540 Sample Variance 38 20 State the null and alternative hypotheses to be tested. Compute the test statistic. Determine the pvalue. At 5% signicance level, what do you conclude? moo-9