Question

In: Statistics and Probability

In this study, researchers were interested in knowing if the amount of coffee (none, one cup,...

In this study, researchers were interested in knowing if the amount of coffee (none, one cup, 4 cups) and the time coffee was ingested (am v. pm) affected student exam performance (exams were in the evening). This study took place over a 3-day period. Students were randomly assigned to either ingest coffee in the morning (AM) or the evening (PM). On day one, students were given no coffee; on day two, students were given one cup of coffee; and on day three, students were given four cups of coffee. Below are the data from this experiment. Exam scores could range from 0-100, higher scores indicate better exam performance.

Participant

Amount of Coffee

Time coffee was ingested

Exam Score

1

None

AM

75

One cup

AM

84

4 cups

AM

70

2

None

PM

70

One cup

PM

84

4 cups

PM

50

3

None

AM

60

One cup

AM

90

4 cups

AM

78

4

None

PM

70

One cup

PM

80

4 cups

PM

62

5

None

AM

70

One cup

AM

87

4 cups

AM

69

6

None

PM

62

One cup

PM

79

4 cups

PM

46

7

None

AM

75

One cup

AM

96

4 cups

AM

81

8

None

PM

68

One cup

PM

92

4 cups

PM

63
  1. What type of design is this experiment? (between-subjects, within-subjects, mixed) Be sure to also write the factorial notation.
  2. What are the IV(s)? Be sure to indicate the levels of and the type of variable (between-subjects, within-subjects).
  3. Draw a block diagram for your variables. Be sure to include cell means and marginal means.

Solutions

Expert Solution

orchestra answered 3 years ago
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