Results 1 to 2 of 2

Math Help - AP stats

  1. #1
    Member
    Joined
    Jan 2008
    Posts
    118

    AP stats

    When testing hypotheses, im having a hard time with the conclusion.
    I can get the p-value, but my book says if you have a low pvalue, you reject the null. For example,

    Trying to see if there is a homefield advantage..
    Ho : p=0.50
    Ha : p>0.50


    P value < 0.0001
    If the true proportion of home team wins were .50, then the observed value of .5496 would occur .0001
    My book says since it is so low, you reject Ho.
    This seems backwards to me, can someone explain?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by Morgan82 View Post
    When testing hypotheses, im having a hard time with the conclusion.
    I can get the p-value, but my book says if you have a low pvalue, you reject the null. For example,

    Trying to see if there is a homefield advantage..
    Ho : p=0.50
    Ha : p>0.50


    P value < 0.0001
    If the true proportion of home team wins were .50, then the observed value of .5496 would occur .0001
    My book says since it is so low, you reject Ho.
    This seems backwards to me, can someone explain?
    No its not, what the p value means is that the probability of getting an observed value as high as 0.5496 or higher by chance if Ho holds is 0.0001.

    So that this value occured given that Ho holds is very unlikely so we reject Ho.

    RonL
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Stats
    Posted in the Statistics Forum
    Replies: 1
    Last Post: October 14th 2009, 02:45 PM
  2. Stats
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: August 9th 2009, 09:07 PM
  3. Stats
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: June 27th 2009, 01:02 AM
  4. STATS HELP!
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: October 5th 2008, 06:02 AM
  5. stats
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: December 31st 2007, 10:23 AM

Search Tags


/mathhelpforum @mathhelpforum