Page 129 - Basic Statistics

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EXERCISES 5

1. Data on the response Y is the amount of suspended solids and the pH of the

cleansing tank in a coal cleasing system recorded in Table 5.17. If the

relationship between the two variables want to be investigated by simple linear

regression models,
a. Estimate the linear regression equation

b. Perform the significance test for the allegation regression equation through F

test

c. Check the accuracy of this model linier relationship Y with X by the

2
coefficient of determination R
d. Perform testing of the coefficient  1 = 0

Table 5.17 Data set of a coal cleasing system

pH Amount of suspended solids
(X1) (Y)

6,5 292
6,9 329
7,8 352
8,4 378
8,8 392
9,2 410
6,7 198
6,9 227

7,5 277
7,9 297
8,7 364
9,2 375
6,5 167
7,0 225
7,2 247

7,6 268
8,7 288
9,2 342

~~* CHAPTER 5 THE MULTIPLE LINEAR REGRESSION MODEL *~~