HW3 Heather Langsdon

# HW3 Heather Langsdon - Homework Assignment 3 Heather...

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Homework Assignment 3 Heather Langsdon M/W 12:30 11.40 a. E(y)= β 0 + β 1 x 1 + β 2 x 2 + β 3 x 1 x 2 b. The number ahead in line(x 1) and the number behind in line(x 2) together directly relate to the subjects negative feelings score(y). 11.59b. Ŷ=154243-1908x+5.93x 2 c. Ho: β 2 =0 Ha: β 2 >0 p-vaule=0; Sufficient evidence at α=.05 that there is an upward curving relationship between failure time(y) and temperate(x). (printout 1) 11.67 b. E(y)= β 0+ β 1 x , x=1 manual and x=0 if automated; β 0 = mean quality for automated and β 1= mean quality for manual- mean quality for automated 11.85 a. substitute x 2 =0, E(y)= β 0 + β 1x1 ; slope= β 1 b. substitute x 2 =1, E(y)= ( β 0 + β 2) +( β 1 + β 3 )x 1 ; Slope: β 1 + β 3 c. At α=.05, There is sufficient evidence of interaction between REE(y) and time(x 1 ) depends on obesity (x 2) 11.95a.Ho= β 4= β 5 =0 b. Complete: E(y)=β 0 + β 1 x 1 + β 2 x 2 + β 3 x 1 x 2 + β 4 x 1 2 + β 5 x 1 2 x 2 Reduced: E(y)= β 0 + β 1 x 1 + β 2 x 2 + β 3 x 1 x 2 c. Ho: β 3 5 =0 d. Complete: E(y)= β 0 + β 1 x 1 + β 2 x 2 + β 3 x 1 x 2 4 x 1 2 + β 5 x 1 2 x 2 Reduced: E(y)= β 0 + β 1 x 1 + β 2 x 2 + β 4 x 1 2 11.110 a. No curvature in model

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HW3 Heather Langsdon - Homework Assignment 3 Heather...

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