Question

Which is true about post hoc tests? Post hoc tests are not needed when comparing 3...

Which is true about post hoc tests?

Post hoc tests are not needed when comparing 3 or more group means.

Tukey's HSD test is the most conservative post hoc test.

Tukey's HSD is used when all conditions are being compared.

Scheffe's test is the most common post hoc analysis.

Math   Statistics-And-Probability   
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Answer #1

Sol;

when we find significant difference in means in ANOVA we use post hoc to know which group means are different.

scheffe test is used when sample sizes are of not equal size and tukey used when sample sizes are of equal size

scheffe 's test is a very popular and the most conservative post hoc test

Tukey is also more conservative test like scheffe

For all pairwise comaprisons Tukey HSD is a good choice

ANSWER'

Tukey's HSD is used when all conditions are being compared.

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