Probability

1) Compare The F Value To The Critical Value

Directions: Scenario: Read the scenario to the right, then fill in the blanks in A researcher wants to test the effect of two kinds of
the table to the lower right and answer the questions chocolate (dark and milk) on memory. A control group is
below by selecting the correct answer. included which will not consume any chocolate during the
quot; ‘ quot;’ 7 experiment. Each group contains 10 people, for a total
1 1 Compare the F value to the critical value given sample size of 30. Participants in the three groups are
in the table. Is the result of this test statistically given a series of numbers and are tested on their ability
significant? to remember the numbers. The scores on the memory
Yes No t _
est are shown below. 2 I Should a Tukey’s HSD post hoc test be performed? Group 1′ Dark Chocolate: 5. 6- 6- . 8′ 8′ 9’10! 10 (Mean: 7’8) 9.
Group 2, Milk Chocolate: 4, 4. 5, 5. 5. 6. 6. 7. 7, 8 (Mean: 5.?)
YES NO Group 3. No Chocolate: 2. 2. 3. 3. . 4, 4. 5. 6. 7 (Mean: 3.9) 3 : According to the HSD results, is there a Source 55 df Crit. F (’05) MS F
significant difference between group i and group 2?
–l –n
Yes No 4 : According to the HSD results, is there a significant difference between group1 and group — —
3? ‘
No Yes
Tukey’s HSD Test [.05] = 1.77 Statistics and Probability

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