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, 22.06.2019 07:30
Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?
Answers: 1
Physics, 22.06.2019 14:30
What was the first instrument to ever record an earthquake?
Answers: 1
Physics, 23.06.2019 06:30
If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.
Answers: 1
Physics, 23.06.2019 09:00
You are waiting in line to use the diving board at your local pool.while watching people dive into the pool from the board,you realize that using a diving board to spring into the air before a dive is good example newton's third law of motion.explain how a diving board illustrated newton's law of motion
Answers: 1
Suppose that a large controlled experiment tests whether caffeine improves reaction times. a very la...
History, 27.06.2019 01:30
English, 27.06.2019 01:30