+ Reply to Thread
Results 1 to 2 of 2

Thread: MANOVA and Levene's Test Significant Values

  1. #1
    Points: 1,823, Level: 25
    Level completed: 23%, Points required for next Level: 77

    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    MANOVA and Levene's Test Significant Values




    Hi

    I've conducted a MANOVA with 11 dependent variables.

    All the other assumptions have been met, except the Levene's test. Levene's
    test of Equality of Error Variances is significant for 3 of the dependent variables.

    Does this mean, the MANOVA SPSS results will not be meaningful?

    Will it be better to report t-test results for the 11 variables?

    Or is it recommended to report t-tests for those 3 variables with significant values on Levene's test?

    Or would it be better to re-do the manova with the remaining 8 variables and exclude the 3 with significant Levene's test values?

    I have not found any book explaining clearly what should be done if Levene's test is significant.

    Please HELP!

    Thank you,

    Simm

  2. #2
    TS Contributor
    Points: 4,781, Level: 44
    Level completed: 16%, Points required for next Level: 169
    terzi's Avatar
    Location
    Poza Rica, Mexico
    Posts
    417
    Thanks
    10
    Thanked 32 Times in 31 Posts

    You should test for equality in covariance matrices


    The assumptions in MANOVA are regarding the covariance matrices. You should test for equality in the covariance matrices across groups. SPSS calculates the M-Box statistic to test that.

    Still, there are many issues related to the M-Box statistic. If you don't "pass" the test (that is, you reject the null hypothesis) one criterion, subjective but useful, is to examine the log of the determinants from all the covariance matrices for each group and also for the error matrix. If those numbers are similar there shouldn't be much trouble.
    Statisticians are engaged in an exhausting but exhilarating struggle with the biggest challenge that philosophy makes to science: how do we translate information into knowledge

+ Reply to Thread

           




Similar Threads

  1. Levene's test in SPSS
    By Burnsie in forum SPSS
    Replies: 2
    Last Post: 09-18-2013, 03:15 AM
  2. Is Levene's transformation with ANOVA equivalent to Levene's W?
    By amesshaps in forum Statistical Research
    Replies: 0
    Last Post: 03-25-2011, 09:36 PM
  3. Levene's Test - Large F Value
    By PoLyGLoT in forum Statistical Research
    Replies: 1
    Last Post: 10-02-2009, 11:02 AM
  4. F-value in SPSS Levene's test
    By mrhajdi in forum SPSS
    Replies: 0
    Last Post: 04-13-2009, 08:57 AM
  5. Help in Levene's test, Please
    By bom_bomkung in forum Psychology Statistics
    Replies: 12
    Last Post: 12-30-2006, 04:29 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats