Answered

Get the answers you need at Westonci.ca, where our expert community is always ready to help with accurate information. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

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+b
a=-1.072
b=22.446
r2=0.383161
r=-0.619
Assume the correlation is significant, and use this to predict the number of situps a person who watches 2.5 hours of TV can do (to one decimal place)

Sagot :

MrRoyal

Answer:

19.8 sit ups

Step-by-step explanation:

Given

The results of regression

[tex]a=-1.072[/tex]

[tex]b=22.446[/tex]

[tex]r^2=0.383161[/tex]

[tex]r=-0.619[/tex]

Required

Predict y when x = 2.5

First, we determine the regression equation using:

[tex]y =ax + b[/tex]

So, we have:

[tex]y = 1.072x + 22.446[/tex]

Substitute 2.5 for x to get the number of situps (y)

[tex]y = -1.072*2.5 + 22.446[/tex]

[tex]y = -2.68 + 22.446[/tex]

[tex]y = 19.766[/tex]

Approximate

[tex]y = 19.8[/tex]

We hope our answers were useful. Return anytime for more information and answers to any other questions you have. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Thank you for visiting Westonci.ca. Stay informed by coming back for more detailed answers.