The independent variable in this study, where, a researcher conducted an experiment to investigate the effects of ambient room noise on test performance among college students, is noise.
A performance test is a type of assessment where the test taker must carry out the task or activity at hand rather than just respond to questions about it. Greater faithfulness to the subject matter of the test is the goal.
By comparing the probability of the two random variables, you may determine if they are independent. These variables are independent if the probability do not alter when the events occur. The two variables are not independent if they are correlated, to put it another way.
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