The frequency of air exchange is believed to influence the indoor climate in unheated historic buildings. This is important because many unheated historic buildings hold collections of artifacts, and...

The frequency of air exchange is believed to influence the indoor climate in unheated historic buildings. This is important because many unheated historic buildings hold collections of artifacts, and the indoor climate is related to preservation of these items. Skokloster Castle in Sweden is a masonry building without active climate control that houses many artifacts.27 A random sample of days during the year was obtained. The air changes per hour (x, ACH) and the climate fluctuations transmittance related to relative humidity (y, CFT) was measured in similar rooms. CLIMATE

a. Construct a scatter plot for these data, and describe the relationship between the two variables.

b. Find the estimated regression line. Does the estimate of b1 agree with your description in part (a)? Why or why not?

c. Conduct an F test for a significant regression. Find the p value associated with this test.

d. Find a 99% confidence interval for the true mean CFT for an ACH of 0.5.

e. Using your confidence interval in part (d), is there any evidence that the mean CFT is different from 0.75?