Advanced Placement (AP), 13.01.2020 02:31 76KamLan

In a research studying the effect of sugar intake on concentration, the researcher randomly assigns student participants to either a group that receives water before taking a test or juice and candy before taking a test. the independent variable in the study is the:

sugar consumption
water
test scores
control group
the difference between test scores

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In a research studying the effect of sugar intake on concentration, the researcher randomly assigns...