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what test must be performed prior to conducting an analysis of covariance (ANCOVA). Bfriefly explain

what test must be performed prior to conducting an analysis of covariance (ANCOVA). Bfriefly explain

Math   Statistics-And-Probability   
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Answer #1
  • Assumption #6: There needs to be homogeneity of variances. You can test this assumption in SPSS Statistics using Levene's test for homogeneity of variances. In our enhanced one-way ANCOVA guide, we (a) show you how to perform Levene’s test for homogeneity of variances in SPSS Statistics, (b) explain some of the things you will need to consider when interpreting your data, and (c) present possible ways to continue with your analysis if your data fails to meet this assumption.

  • Prior to the ANCOVA test, Levene's test for equality of variances is performed. If the Levene test is positive (P<0.05) then the variances in the groups are different (the groups are not homogeneous), and therefore the assumptions for ANCOVA are not met.

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