Biology, 17.08.2020 01:01 magalya01

A scientist is testing how caffeine affects people’s sleep. She asks one group of people to drink one can of Coke before bed. She asks a second group of people to drink one cup of water before bed. Over a period of one month, she determines that the Coca Cola drinkers slept 45 minutes less per night than the water drinkers. What is the INDEPENDENT VARIABLE?

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A scientist is testing how caffeine affects people’s sleep. She asks one group of people to drink on...

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