Plant Emissions. Following are the data on plant weight and quantity of volatile emissions from Exercise 15.25.

x 57 85 57 65 52 67 62 80 77 53 68 y 8.0 22.0 10.5 22.5 12.0 11.5 7.5 13.0 16.5 21.0 12.0

a. Obtain a point estimate for the mean quantity of volatile emissions of all (Solanum tuberosum) plants that weigh 60 g.

b. Find a 95% confidence interval for the mean quantity of volatile emissions of all plants that weigh 60 g.

c. Find the predicted quantity of volatile emissions for a plant that weighs 60 g.

d. Determine a 95% prediction interval for the quantity of volatile emissions for a plant that weighs 60 g.