METHODS OF DATA ANALYSIS
PARAMETRIC AND NON PARAMETRIC TESTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An ANOVA comparing three treatments produces an overall F-ratio wid df=2, 27. If the Scheffe’ test was used to compare two of the three treatments, then the Scheffe’ F-ratio would also have df=2, 27.
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False
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True
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The hypotheses for ANOVA: Null hypothesis: All three treatments are the same i.e. the means for all three treatments are equal. Alternative hypothesis: At least one of the three means is different than the other two means.
Detailed explanation-2: -The F-ratio uses variance because ANOVA can have many samples of data, not just two as in T-Tests. Using the variance lets us look at the differences that exist between all of the many samples.
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