. Bivariate Fit of Brain weight(g) By Brain volume (cm^3) 1600 1500 O 1400 1300

Question

. Bivariate Fit of Brain weight(g) By Brain volume (cm^3) 1600 1500 O 1400 1300 1200 1100 1000 3500 Brain volume (cmA3) 2500 3000 4000 4500 5000 Linear Fit Linear Fit Brain weight(g) 325.57342 0.2634293*Brain volume (cm1) Summary of Fit RSquare RSquare Adj Root Mean Square Error Mean of Response Observations (or Sum Wgts) 0.639312 0.637777 72.42687 1282.873 237 Lack Of Fit Analysis of Variance Sum of Source Model Error 1 2184982.2 235 1232728.0 C. Total236 3417710.2 DF Squares Mean Square FRatio 2184982 416.5321 5246 Prob >F t 25.57342 47.14085 6.91

Explanation / Answer

h) i) degree of freedom =n-p=n-2=235

(ii) for 235 degree of freedom and 95% CI critical value of t =1.9701

(iiii) lower bound =sample slope -t*Std error =0.2634293 -1.9701*0.012907 =0.238001

upper bound =sample slope +t*Std error =0.2634293 +1.9701*0.012907 =0.288857

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