In a study to determine the relationship between ambient outdoor temperature and the rate of evaporation of water from soil, measurements of average daytime temperature in °C and evaporation in millimeters per day were taken for 10 days. The results are shown in the following table.

a. Compute the least-squares line for predicting evaporation (y) from temperature (x).

b. Construct a 99% confidence interval for β1.

c. Test H0: β1 = 0 versus H1: β1 ≠ 0.

Can you conclude that temperature is useful in predicting evaporation? Use the

α = 0.05 level of significance.

Temperature Evaporation 11.8 2.4 21.5 4.4 16.5 5.0 23.6 4.1 19.1 6.0 21.6 5.9 31.0 4.8 18.9 3.0 24.2 7.1 19.1 1.6