Question: The following data have to do with the relationship between maternal smoking (# of cigarettes smoked per day, which is variable X) and infant birth

The following data have to do with the relationship between maternal smoking (# of cigarettes smoked per day,

which is variable X) and infant birth weight (which is variable Y). (X, X2, Y, Y2,and XY have already been

calculated for you and are shown below in red font.)

Cigarettes Per Day (X) X2 Infant Birth Weight (Y) Y2 XY

24 7.5 56.2515.0

6367.2 51.84 43.2

10 100 6.9 47.6169.0

12 144 6.2 38.4474.4

14 196 5.8 33.64 81.2

X = 44 X2 = 480 Y = 33.6 Y2 = 227.78 XY = 282.8

What is the slope (b)?

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