If each part could be separated so each process could be eas

If each part could be separated so each process could be easily seen!

Thank you!

A survey was done with the hope of computing salaries of chemical plant managers employed in two areas of the country, the northern and west central regions. An independent random sample of 21 plant managers was selected from each of the two regions. These managers were asked their annual salaries. The result are as follows; Construct a 90% confidence interval for ratio of variances. Part 2: Can we conclude the equality of variances? Why? Based on the sample data from Question 3 and by comparing test stat with critical value, conduct a test of hypothesis for difference of means with alpha = 0.05.

Solution