Results 1 to 5 of 5

Math Help - linear regression

  1. #1
    Newbie
    Joined
    Dec 2011
    Posts
    22

    linear regression

    Hello,

    I am trying to figure this out using a TI-83 calculator.

    Problem #1

    Based on the data from six students, the regression equation equation relating number of hours of preparation (x) and test score (y) is y=67.3+1.07x. The same data yield r=0.224 and y=75.2. What is the best predicted test score for a student who spent 4 hours preparing for the test?

    A. 78.1
    B. 59.7
    C. 75.2
    D. 71.6

    Problem #2

    Given linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significant level of 0.05

    r= -.242 n=90

    A. Critical Values r=0.217 significant linear correlation
    B. Critical Values r= (+ or -) 0.217 no significant linear correlation
    C. Critical Values r= (+ or -) 0.207 significant linear correlation
    D. Critical Values r- (+ or -) 0.207 no significant linear correlation
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,790
    Thanks
    1531

    Re: linear regression

    Have you made any attempt at all? The first problem is really just simple arithmetic. Show us what you have tried for the second so we will know what kind of help you need.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Dec 2011
    Posts
    22

    Re: linear regression

    I honestly don't know, I was sick and missed class. I tried reading in the book but it being a custom edition for the school wasn't really all that helpful.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Dec 2011
    Posts
    22

    Re: linear regression

    anyone please?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Nov 2012
    From
    nagercoil
    Posts
    11

    Re: linear regression

    How to comment on the reliability of predictions using the linear regression equation?




    bar stool
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. perpendicular linear span (linear regression)
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: October 22nd 2011, 03:56 PM
  2. Regression fundamentals (linear, non linear, simple, multiple)
    Posted in the Advanced Statistics Forum
    Replies: 13
    Last Post: November 12th 2009, 06:47 AM
  3. Linear regression
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: July 7th 2009, 03:59 PM
  4. Regression SS in multiple linear regression
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: June 20th 2009, 12:23 PM
  5. Linear Regression: C++
    Posted in the Math Software Forum
    Replies: 2
    Last Post: July 28th 2008, 06:11 PM

Search Tags


/mathhelpforum @mathhelpforum