iSixSigma

P-value @ ANOVA

Six Sigma – iSixSigma › Forums › Old Forums › General › P-value @ ANOVA

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • May 19, 2009 at 4:20 pm #52376

    BartW
    ★ 10 Years ★
    Participant

    Good day!
    I have an exame in just one day and I try to finetune my statistic knowhow. But one thing I don´t know, and that is how to calculate a p-value when you’re working with ANOVA.
    Here’s the question.
    What is the P-value for the difference between the mean life span of the different type of batteries?
    http://i40.tinypic.com/295ra6e.jpg  ( link for tabel )
    MSA=875,783MSW=194,025  so F=4,51377And df1=3 and df2=16 But I don’t how to continue for the P-value.in the answer sheet they give 0,0178Could someone please help, it saves me a lot of frustration.
    (and I apologize for my bad English, I’m Dutch)
    GreetingsBart

    0
    May 19, 2009 at 4:30 pm #184236

    Mikel
    ★ 10 Years ★
    Member

    Go to the Fdist in Excel with a value of 4,51377 and fill in df of 3 and 16. You will see the value you referenced.
    ANOVA uses the F distribution, Fdist is for when you have a calculated value and you want to know the probability.

    0
    May 19, 2009 at 4:34 pm #184238

    BartW
    ★ 10 Years ★
    Participant

    Thanx for the quick answer
    But is it also possible to calculate by hand? Because they asked in a previous exam when there was no Excel available. We only have a graphic computer (TI-84)

    0
    May 19, 2009 at 11:13 pm #184247

    Mikel
    ★ 10 Years ★
    Member

    You can interprolate from an F table.

    0
    May 20, 2009 at 10:05 am #184252

    Craig
    ★ 10 Years ★
    Participant

    I can’t recall ever calculating the p-value by hand. (Used a table with interpolation as Stan mentioned, or obtained directly from software application). Seems like the technique they want you to use should be in the class notes.

    0
  • Author
    Posts
Viewing 5 posts - 1 through 5 (of 5 total)

The forum ‘General’ is closed to new topics and replies.