Question

Heights (in centimeters) and weights (in kilograms) of 7 7 supermodels are given below. Find the regression equation, letting the first variable be the independent (?) ( x ) variable, and predict the weight of a supermodel who is 169 169 cm tall. HeightWeight17253176541725217656178581745517655 Height 172 176 172 176 178 174 176 Weight 53 54 52 56 58 55 55

The regression equation is ?̂= _____ + _____ ?.

The best predicted weight of a supermodel who is 169 cm tall is ____

Answer 1

We can use here Excel for regression equation

Step 1) Enter data in Excel .

Step 2) Data >>Data analysis >>Regression >>Select y and x values separately >>Ok

The regression equation is ?̂= -79.6667+ 0.7685?.

The best predicted weight of a supermodel who is 169 cm tall is

Substitute x=169 into regression equation

=>?̂= -79.6667+ 0.7685(169)

=>?̂= 50.21