Question

Interpret the prediction output Variable Setting DomForearm 25.6 DomHand 20.2 Sex F Prediction Fit SE Fit...

Interpret the prediction output

Variable

Setting

DomForearm

25.6

DomHand

20.2

Sex

F

Prediction

Fit

SE Fit

95% CI

95% PI

164.315

2.01233

(160.277, 168.353)

(152.002, 176.627)
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Sol:

Regression equation is

y^=a+b1*DomForearm+b2*DomHand+b3*Sex

For a given

DomForearm

25.6

DomHand

20.2

Sex

F

subsitutiting the above values we got the avergae predicted value for Y


y^=164.315

the fited value of Y for Domforearm=25.6,Domhand=20.2 and sex=F is 164.315

95% confidence interval of Y for Domforearm=25.6,Domhand=20.2 and sex=F

lies in between 160.277 and 168.353

95% prediction interval of Y for Domforearm=25.6,Domhand=20.2 and sex=F

lies in between 152.002 and 176.627

prediction interval is wider than confidence interval

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