6. A. For asignificance level 0.05, a P -valueof 0.025 in an ANOVA means that th

ID: 2952345 • Letter: 6

Question

6. A. For asignificance level 0.05, a P-valueof 0.025 in an ANOVA means

that the data giveevidence that the means of all populations are equal? _____ (3pts)

a) True b)False

B. Which populationmeans can be considered significantly different

in the Tukey Groupingshown below? _____ (3 pts)

a) 1, 3 and 5 b) 2 and4

c) 3 and 5 d) 1, 2, 3and 4

Population Mean TukeyGrouping

3 17.95 A

2 15.25 A B

4 12.80 A B

1 11.15 B

C. Statistical powermeasures the ability to reject the null hypothesis

when the nullhypothesis is false? _____ (3 pts)

a) True b)False

D. Increasing thesample size will decrease the power of a test? _____ (3pts)

a) True b)False

c) Sometimes d) Itdepends

A) b) False B) a) 1, 3 and 5 C) a) True D) b) False

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