Question

A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were :Y=ax+ba= -0.736b=30.391r^2=0.712336r= -0.844Use this to predict the number of sit-ups a person who watches 8 hours of Tv can do (to one decimal place)

Answer 1

The function that relates x and y was found to be:

y = -0.736x + 30.391

It's required to find the value of y when x = 8:

y = -0.736 (8) + 30.391

Operating:

y = -5.888 + 30.391

y = 24.503

Rounding to one decimal place:

y = 24.5