Question

Due in 21 hours, 40 minutes. Due Thu 07/30/2020 9:59 A regression analysis was performed to determine if there is a relationship between hours of TV watched per day (2) and number of sit ups a person can do (y). The results of the regression were: y-ax+b a-1.215 b=26.883 r2-0.364816 --0.604 Use this to predict the number of sit ups a person who watches 12 hours of TV can do, and please round your answer to a whole number.

Answer 1

Here X is represents the hours of TV watched per day.
And Y represents the number of sit ups a person can do

Regression line that best describes the relation between X and y is given by
$\small \\Y=a+bx\;\;where\;a\;estimated\;as\;-1.215\;and\;b\;estimated\;as\;26.883\\ Hence \;our \;regression\;line\;is:\;\boldsymbol{Y=26.883-1.215x}$

A person watches 12 hrs of tv implies X=12
Then value of Y at X=12 is (26.883-(1.215*12))=12.303~ 12

Hence predicted number of sit ups a person who watches 1 hrs of TV can do, is 12