Calculating Margin of Error for 95% Confidence Interval in Rent Predictions

[rowdy3]

To capture the actual Rent amount 95% of the time, predictions from the fitted equation should include a margin of error of about plus or minus ______ (round to the nearest ten dollars).
$128
$114 (answer)
$57
$228
Here's a pic of the table. How did they get the answer? http://picturetrail.com/sfx/album/view/24285022
I know k2= 95%. I know you do 2 * (standard error) but I don't see that on the table.

 

[Bacle2]

Is this an inference for regression test that you're doing?

 

[rowdy3]

Yes I think so.

 

[Bacle2]

Check out :

http://www.stat.berkeley.edu/~thornton/STAT20/lec18slides4.pdf

focus on pages 3,4, and let us know if you need more help.

 

[Bacle2]

Please let me know if you need more help.