Find the 95% confidence interval for the slope in each of the following settings. (Round your answers to three decimal places.)
(a)
n = 20, = 24.5 + 1.6x, and SEb1 = 0.75
(b)
n = 30, = 30.4 + 2.5x, and SEb1 = 1.25
(c)
n = 100, = 29.5 + 2.5x, and SEb1 = 1.25