Mary is planning a study to see if learning of 6th graders on a math
lesson is affected by background noise level. She wants to use a t-test
for independent groups to analyze her results. Help her plan her study.
What is her independent variable (IV) here? Describe two conditions she
could create for the IV in her study. What is her dependent variable
(DV) here? Describe a way to measure the DV so that each participant
would have one score at the end. Would this DV measure be on a
continuous scale of measurement? Why is this important? Explain and