Question 23

You are required to setup a predictive equation involving variable 1 and variable 2.First you

plot the DATA to determine if linear regression applies. You decide

variable1 variable2

-1.60263 6.66630

5.13511 22.39796

6.36533 48.04439

5.62218 33.73949

-2.19935 13.13368

6.44037 34.07411

7.53576 57.43268

6.84911 46.18391

-0.96507 2.31758

-7.97987 66.45126

7.71148 60.12220

8.00414 69.34776

-1.84249 -8.58487

-6.64529 35.44469

3.52281 15.81326

6.12823 42.51683

-8.02429 63.53322

1.93739 10.39306

1.60250 -1.67370

9.59542 92.44574

0.97873 -2.22144

7.61991 66.59948

6.35683 35.62167

4.60624 15.37388

Choose your answer from the following:

a) You need more information before deciding to use linear regression

b) The linear regression will be very useful because the points have a strong linear pattern

c) Linear regression in not useful because the points have no discernible pattern

d) Linear regression is not applicable because the point pattern is curvilinear ( has a curve)

e) Linear regression is not applicable because it appearsthat there are two linear patterns

indicating that the data come from two populations.