A researcher plans to do an experiment in the college settingconcerning the effects of class size on attendance in a first yearlaw course. He has four levels of size, namely, 15, 25, 40, and 60students. Four colleges are involved in the study, each havingeight first-year law classes, two of each class size. Theresearcher can assign students at random to a class within acollege. All professors teach four classes; the dependent variableis grades measured after one semester. Discuss the problems ofcontrol in this situation. Consider possible uncontrolled variablesand variables that are or might be controlled. Is there apossibility of confounding variables in this research situation?State one or more hypotheses for this experiment.
