Question

Chapter 9, Section 1, Exercise 002 Use the computer output to estimate the intercept β0 and the slope β- The regression equation is Y 823 - 3.67X. Predictor Coef SE Coef Constant 822.899 89.45 9.20 0.000 -3.674 1.205-3.05 0.006 intercept β0 : Slope 1

Answer 1

Q.1) The regression equation is,

Y = 823 - 3.67X

Where,

Intercept $\beta_0$ : 823

Slope $\beta_1$ : -3.67

Q.2) The regression equation is,

Y = 93.3 - 7.89X

Sample slope = -7.89

p-value = 0.000

Here, p-value = 0.000 < $\alpha = 0.05$

Implies that model is effective.

Q.3) The regression equation is,

Y = 84.8 - 0.0154X

Sample slope = -0.0154

p-value = 0.245

Here, p-value = 0.245 > $\alpha = 0.05$

Implies that model is not effective.