Question

A regression analysis was performed to determine if there is a relationship between hours of TV watched per day (x) and number of sit ups a person can do (y ). The results of the regression were: y=ax+b a=-1.326 b=30.621 p2=0.6561 r=-0.81 Use this to predict the number of sit ups a person who watches 14 hours of TV can do, and please round your answer to a whole number.

Answer 1

Solution:-

Let x be the hours of TV watched per day and y be the number of sit-ups a person can do.

Least square regression equation:

The least square regression equation is given below:

y = ax + b

y = -1.326x+ 30.621

Here, a = -1.326 is the slope and b = 30.621 is the slope coefficient of independent variable.

So here given, x = 14

y = (-1.326)(14) + 30.621

y = 12.057

y = 12 (Rounde ans)

y = 12 sit ups