Results 1 to 4 of 4
Like Tree2Thanks
  • 1 Post By SpringFan25
  • 1 Post By SpringFan25

Math Help - Correlation Question help?

  1. #1
    Junior Member
    Joined
    Mar 2013
    From
    Unknown
    Posts
    73
    Thanks
    2

    Exclamation Correlation Question help?

    A company keeps records of its new salespeople on the number of months on the job and the monthly sales generated.
    A random sample of 7 new salespeople was chosen and their data is given in the table below.

    x(months on the job) 4 , 2 , 12 , 1 , 5 , 9 , 8
    y(sales generated in July 2010 , in thousand dollars) 7.0 , k , 15.2 , 1.0 , 3.5 , 12.1 , 10.9

    Question:

    The company wants to know if there is a strong linear corrrelation between y and x by just calculating the correlation coefficient.
    Comment if this is advisable.

    Im not sure on how i should answer this question. I kind of think its somehow related to how correlation does not imply cause.
    Am i right? If not, how should i answer this question?

    thank you very much!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    May 2010
    Posts
    1,030
    Thanks
    28

    Re: Correlation Question help?

    you are right that correlation does not imply cause, but the company is not investigating "cause". They are only interested in linear correlation.

    So the issue iswhether you can use your sample to determine if there is a "strong" correlation or not. Consider if the sample is large enough to do this.
    Thanks from pumbaa213
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Mar 2013
    From
    Unknown
    Posts
    73
    Thanks
    2

    Re: Correlation Question help?

    Oh! I see. Okay, i tried plotting a scatter diagram using my graphing calculator and i got a fairly straight line. (I had k be 0 for this)
    Am i heading in the right direction? Thanks for the help!
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    May 2010
    Posts
    1,030
    Thanks
    28

    Re: Correlation Question help?

    it looks straight to me as well. whether this is an appropriate answer depends on your level of study.....in advanced courses you may be expected to do some kind of quantitative test.
    Thanks from pumbaa213
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. correlation question
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: June 26th 2013, 10:34 AM
  2. correlation question
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: September 5th 2011, 02:05 AM
  3. Basic correlation question
    Posted in the Statistics Forum
    Replies: 4
    Last Post: September 16th 2010, 06:12 AM
  4. Correlation Question
    Posted in the Statistics Forum
    Replies: 1
    Last Post: May 12th 2010, 08:07 AM
  5. Correlation Coefficient Question
    Posted in the Statistics Forum
    Replies: 1
    Last Post: May 11th 2010, 02:03 PM

Search Tags


/mathhelpforum @mathhelpforum