rofessor Marks is most interested in whether his students' knowledge increased during the progression of his math course. Students took a quiz at the beginning of the semester and again at the end of the semester. Professor Marks used a:

answer; (d) none of the above;

you should try adrenaline. it kicks in in situations like this.

you probably know the answer. stop asking stupid questions and making me waste my time. j.k. ; )   b.t.w. what are three ratios equivalent to 5 : 11? thx