For a sample of size 18, the following values were obtained:

b0 = 2.27, b1 = −1.46, se = 5.72, ∑(x − ̄x)2 = 360.26, and

̄x = 1.95.

a. Construct a 99% confidence interval for the mean response when x = 2.

b. Construct a 99% prediction interval for an individual response when x = 2.