Question

A researcher was interested in learning about the effect of caffeine consumption on problem solving. To...

A researcher was interested in learning about the effect of caffeine consumption on problem solving. To examine this relationship, participants were randomly selected and assigned to one of four conditions: no caffeine consumption, 100 mg dosage of caffeine, 200 mg dosage of caffeine, or 300 mg dosage of caffeine. The participants were then asked to solve as many anagrams* as possible in a 5 minute period. The results of the study are presented below.
*Anagrams are word puzzles that are solved by rearranging the letters so that each letter is used exactly once to create a new word, for example: No Eagle in Jail = Angelina Jolie or Balk Tables = Basketball.
No Caffeine Group
3
7
4
4
3
8
8
4
4
7
1
5
3
8
5
6
100 mg Group
6
8
9
8
11
10
7
5
5
8
8
5
7
7
9
7
200 mg Group
3
11
6
6
5
8
6
6
8
8
6
9
7
8
9
6
300 mg Group
6
5
7
6
7
5
9
4
10
8
7
7
9
5
3
6


Is there a significant difference in the number of anagrams solved across the different levels of caffeine consumption? Conduct a hypothesis test using an alpha level of .05. Be sure to include all 4 steps of the hypothesis test.
Step 1: State hypotheses (µ may be produced by using alt+m)
Step 2: Determine critical F value
Step 3: Report F ratio
Step 4: Make a decision regarding Ho

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