In a recent study,a random sample of children in grades 2 through 4 showed a significant negative relationship between the amount of homework assigned and student attitudes.What type of study is this?
A)An experiment
B)An observational study that is not a sample survey
C)An observational study that is a sample survey
D)The establishing of a causal relationship through correlation
E)A block design,with grades as blocks

Question

Quizplus · Accepted Answer

This is an observational study because the researchers did not manipulate the amount of homework assigned, they just observed the relationship between homework and student attitudes. It is not a sample survey because the researchers did not ask the students to report their attitudes, they observed them directly.

In a Recent Study,a Random Sample of Children in Grades