Below you are given a partial computer output based on a sam

Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y). What is the regression equation? At alpha =0.05, test for the significance of the slope using the t-test.

Solution

Y = -0.252 X + 30.139

b)

T = -0.252 / 0.022 = 11.45

for alpha = 0.05

alpha / 2 = 0.025

df= 20

critical value : +/- 2.086

reject Ho

so there is significance for the slope