In a study examining the effect of room temperature on academic performance, researchers tested knowledge of basic statistical concepts for two groups of Introduction to Statistics students who took their exams in rooms with different temperatures. One group took their exam in a room heated to 70 degrees Fahrenheit and the second group in a room heated to 90 degrees Fahrenheit. With an alpha level of .05 and a two-tailed t test, the mean number of items students correctly answered in the 70 degree room (M = 7.9 out of 10, SD = 1.1) was significantly greater than the mean number of items students correctly answered in the 90 degree room (M = 6.6, SD = 1.3), t(22) = 2.44, p < .05, η2 = .21. 1. Identify the independent and dependent variables for this study. 2. What is the significance level for this test? What does this value indicate? 3. What does t(22) indicate? How many participants are in this study? 4. What does 2.44 indicate? 5. What does p < .05 indicate? 6. What does η2 = .21 indicate? 7. Can the researchers conclude that room temperature had a significant effect on academic performance? Explain.
In a study examining the effect of room temperature on academic performance, researchers tested knowledge of basic statistical concepts for two groups of Introduction to Statistics students who took their exams in rooms with different temperatures. One group took their exam in a room heated to 70 degrees Fahrenheit and the second group in a room heated to 90 degrees Fahrenheit.
With an alpha level of .05 and a two-tailed t test, the mean number of items students correctly answered in the 70 degree room (M = 7.9 out of 10, SD = 1.1) was significantly greater than the mean number of items students correctly answered in the 90 degree room (M = 6.6, SD = 1.3), t(22) = 2.44, p < .05, η2 = .21.
1. Identify the independent and dependent variables for this study.
2. What is the significance level for this test? What does this value indicate?
3. What does t(22) indicate? How many participants are in this study?
4. What does 2.44 indicate?
5. What does p < .05 indicate?
6. What does η2 = .21 indicate?
7. Can the researchers conclude that room temperature had a significant effect on academic performance? Explain.
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