Does daily caffeine intake make subjects better at memory ta

Does daily caffeine intake make subjects better at memory tasks? A study was conducted in which the daily habits of 30 college students were documented, focusing on how much caffeine they consumed in a week.After a week, the subjects were given a computer-based memory test on which they received a score on a 0 to 100 point scale. Their scores were compared with how much caffeine they consumed that week.

Select all that apply.

Select one or more:

This is best described as an observational study.

The explanatory variable is the amount of caffeine consumed.

This study is best described as an experiment.

The explanatory variable is the score on the computer-based memory test.

The response variable is the score on the computer-based memory test.

The response variable is the amount of caffeine consumed.

Solution

This is best described as an observational study.

The explanatory variable is the amount of caffeine consumed.

The response variable is the score on the computer-based memory test.