Question

A regression was run to determine whether 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 are given below.
y=ax+b
a=−1.077
b=30.98
r2=0.744769
r=−0.863

Use this to predict the number of sit-ups a person who watches 11 hours of TV can do. Give your answer as a whole number.

Answer 1

Answer:

19

Step-by-step explanation:

From the question we have been given this data

y=ax+b

a=−1.077

b=30.98

r2=0.744769

r=−0.863

Where

X = number of situps

Y = number of hours spent watching tv

We have x = 11

Inputting this into the formula we have

Y = (-1.077)(11) + 30.98

Y = −11.847 + 30.98

Y = 19.133

Which is approximately 19

Therefore we conclude that a person who watches TV for 11 hours can do 19 situps.