Question

Which of the below is true about multiple comparisons? (There may be more than one true...

Which of the below is true about multiple comparisons? (There may be more than one true statment.)

A.

Multiple comparisons methods are only used if the null hypothesis of equality of population means is rejected.
B.

Multiple comparisons methods are only used if the null hypothesis of equality of population means is not rejected.
C.

Multiple comparisons are used when there are no upfront expectations or specific questions regarding the difference between group or population means.
D.

Multiple comparisons are used when there are upfront expectations or specific questions regarding the difference between group or population means.
Math   Statistics-And-Probability   
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Answer #1

Answer: A, C and D are correct answer because we use multiple comparisons for that conditions given in A, C and D. that are,

A. Multiple comparisons methods are only used if the null hypothesis of equality of population means is rejected.

C. Multiple comparisons are used when there are no upfront expectations or specific questions regarding the difference between group or population means.

D. Multiple comparisons are used when there are upfront expectations or specific questions regarding the difference between group or population means.

****the B is not correct because there where no use to do multiple comparison when the null hypothesis is accept.

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