A formal trial undertaken to confirm or disconfirm a hypothesis about cause and effect is called a(n)

A professor wants to design her courses to offer students the best chance of succeeding. In order to determine the best approach to use, she decides to vary the number of quizzes she administers during her first two years of teaching

What is a good dependent variable for this professor to use? a) number of absences in each class b) average grade in each of the classes c) students' scores on the Scholastic Aptitude Test d) number of seniors in each of the classes she teaches

Of all the conditions of bereavement, which has received the most research

attention? a. death of a child b. death of a spouse c. death of a parent d. death of a sibling e. death of a close friend