Does reaction time (measured in seconds) depend on how much coffee is consumed? Researchers design an...

Does reaction time (measured in seconds) depend on how much coffee is consumed? Researchers design an experiment in which subjects are instructed to look at a computer screen and respond as quickly as possible—by pressing a button—as soon as a particular stimulus appears on the computer screen. Prior to responding to the computer stimulus, subjects are either randomly assigned to drink no coffee, to drink one cup of coffee, or to drink two cups of coffee. It is observed that those subjects who drink the most coffee have the shortest reaction times (or react faster), on average, than those who drink no coffee at all. In this experiment, the response variable

A. is the variable being manipulated by the experimenter.

B. is a categorical variable.

C. is a quantitative variable.

D. is the number of subjects who took part in the experiment. E. is the stimulus that appeared on the computer screen

Expert Solution

Here the response variable is to drink no coffee, to drink one cup of coffee, or to drink two cups of coffee. So the response variable is

c) is quantitative vatiable

orchestra answered 2 years ago

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