Consider the scenario. a scientist studying test taking sets up an experiment to see how sleep affects a student's success at taking a test. the scientist sets up four groups of students. one group is allowed to sleep 10 hours before taking a test. another group sleeps for 8 hours, the third group sleeps for 6 hours, and the fourth group sleeps for 4 hours. the students all take the same test at the same time in the morning in the same room. the scientist counts how many questions each student gets right and wrong. question what is the independent variable? number of correct answers number of correct answers duration of test duration of test hours of sleep hours of sleep

The independent variable is the variable that is being manipulated in the reaction. It is the variable that is changed as the experiment progresses. The impact of this variable on the dependent variable is the subject of study in the experiment.

In this case, the experiment is trying to find out the effect of the hours that a student sleeps on the student's success at taking a test. In other words, the experiment is to establish whether or not the hours that a student sleeps has an effect on the student's success at taking a test.

Thus, the independent variable in this study is the number of hours that a student sleeps and the dependent variable is the number of numbers that the students get right or wrong.

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