Question

A regression was run to determine if there is a relationship between hours of tv watched per day (x) and the number of situps a person can do (y).The results of the regression were:y=ax+ba=−1.077b=30.98r2=0.744769r=−0.863Use this to predict the number of situps a person who watches 13.5 hours of TV can do.

Answer 1

Answer:

The number of situps is: 16.4405

Step-by-step explanation:

Given

$y = ax + b$

$a =-1.077$

$b=30.98$

$r^2 = 0.74476$

Required

Predict y when $x = 13.5$

In the result, we have:

$y = ax + b$

$a =-1.077$

$b=30.98$

This implies that:

$y = -1.077x + 30.98$

To make prediction when $x = 13.5$

We have:

$y = -1.077*13.5 + 30.98$

$y = -14.5395 + 30.98$

$y = 16.4405$