Answer Questions47 through 52 using the following data regarding maternal smoking and infant birth weight.(X,X², Y,Y²,

and XY have already been calculated for you and are shown below.)

Cigarettes Per Day (X)X²Infant Birth Weight (Y)Y²XY

247.556.2515.0

6367.251.8443.2

101006.947.6169.0

121446.238.4474.4

X=30X²=284Y=27.8Y²=194.14XY=201.6

What is the regression equation for this data?

= 7.85X + (-0.12)

= 8.33X + (-2.30)

= 4.44X + 8.33

= -0.12X + 7.85