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.)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.
Answers: 3
Physics, 21.06.2019 17:50
In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?
Answers: 2
Physics, 22.06.2019 01:00
Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v
Answers: 3
Suppose that a large controlled experiment tests whether caffeine improves reaction times. a very la...
Chemistry, 12.01.2021 18:50
Chemistry, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
Chemistry, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
History, 12.01.2021 18:50
Mathematics, 12.01.2021 18:50
History, 12.01.2021 18:50