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In: Statistics and Probability

A study was performed on wear of a bearing y and its relationship to x1 =...

A study was performed on wear of a bearing y and its relationship to x1 = oil viscosity and x2 = load. The following data was obtained.

Y

X1

X2

293

1.6

851

230

15.5

816

172

22.0

1058

91

43.0

1201

113

33.0

1357

125

40.0

1115

Minitab results would be preferrable.

a) Fit a multiple linear regression model to these data.

b) Estimate ?2.

c) Predict wear in which x1 = 25 and x2 = 1000.

d) Test for significance of regression using ? = 0.05. What is the p-value for this test?

e) Find a 95% confidence interval and prediction interval when x1 = 25 and x2 = 1000.

f) Analyze R2.

g) Analyze the residuals.

Solutions

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orchestra answered 3 years ago
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