Question

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. what is the dependent variable? options: location of test, hours of sleep, time of test start, test score

Explanation:

In an experiment, the dependent variable is the one that is measured or affected. Here, the scientist is studying how sleep (independent variable, with different hours) affects test performance. The test score (number of right/wrong questions) is what's being measured as a result of sleep hours. Location of test, time of test start are controlled (same for all), and hours of sleep is the independent variable. So the dependent variable is test score.

Answer:

test score (the option corresponding to "test score")