Suppose that a large controlled experiment tests whether caffeine improves reaction times. A very large number of randomly selected participants are randomly given identical-seeming pills with varying doses of caffeine (including none) and then given tests of reaction times under the same conditions. The experiment finds a strong negative correlation between caffeine dose and reaction time. (Note that lower reaction times are better.) Select the correct answer below: 1. There is evidence that caffeine causes lower (better) reaction times. 2. People with lower (better) reaction times generally choose to consume more caffeine. 3. Lower reaction times are associated with higher caffeine doses, but this study provides no evidence that caffeine causes lower reaction times. 4. There is no relationship between reaction time and caffeine.
Suppose that a large controlled experiment tests whether caffeine improves reaction times. A very large number of randomly selected participants are randomly given identical-seeming pills with varying doses of caffeine (including none) and then given tests of reaction times under the same conditions. The experiment finds a strong negative correlation between caffeine dose and reaction time. (Note that lower reaction times are better.) Select the correct answer below: 1. There is evidence that caffeine causes lower (better) reaction times. 2. People with lower (better) reaction times generally choose to consume more caffeine. 3. Lower reaction times are associated with higher caffeine doses, but this study provides no evidence that caffeine causes lower reaction times. 4. There is no relationship between reaction time and caffeine.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Suppose that a large controlled experiment tests whether caffeine improves reaction times. A very large number of randomly selected participants are randomly given identical-seeming pills with varying doses of caffeine (including none) and then given tests of reaction times under the same conditions. The experiment finds a strong
Select the correct answer below:
1. There is evidence that caffeine causes lower (better) reaction times.
2. People with lower (better) reaction times generally choose to consume more caffeine.
3. Lower reaction times are associated with higher caffeine doses, but this study provides no evidence that caffeine causes lower reaction times.
4. There is no relationship between reaction time and caffeine.
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