Amanda is interested in studying the effect of time of day and day of the week on test performance. To do this, she tests her class in the morning, the evening, on a Monday, and on a Friday. Then, she graphs their performance on each exam. This is an example of

This is an example of "CORRELATIONAL RESEARCH"

Explanation:

Correlational research is a type of research in which the researcher measures two or more variables to understand the similarities and difference between them, and shows it's result using statistical relationship between them, with out any influence from an extraneous variable. This type of research is non-experimental.

Amanda has performed a correlational research, because she has choosed her variables to be time of the day, and day of the week. And has showed her result using graphical method.

the best answer is b.

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