Chapter 5.12, Problem 64SE

a.

To determine

Find the 95% confidence interval on the average amount of ${\text{SO}}_2$ emissions during each of the time period 6 A.M.

Find the 95% confidence interval on the average amount of ${\text{SO}}_2$ emissions during each of the time period 2 P.M.

Find the 95% confidence interval on the average amount of ${\text{SO}}_2$ emissions during each of the time period 10 P.M.

b.

To determine

Check whether there is significant evidence that the average amounts of ${\text{SO}}_2$ emissions over the three time periods or not.

c.

To determine

Check whether there is significant evidence that the average amount of ${\text{SO}}_2$ emissions using the new scrubber less than 0.145 or not.