People who are high in ___ tend to show ___ to treatment for HIV

About the same percentage of North Americans are obese now as was the case forty years ago

Indicate whether this statement is true or false.

The administration of Midwest State University wants to know if arrangement of chairs affects student participation in classrooms

What would be a good operational definition of the dependent variable in an experiment designed to measure this relationship? a) class size: under 50 or over 50 b) number of students enrolled in each class c) chair arrangement: theater style or circular d) frequency with which students ask questions