College professor hypothesizes that readers will The characteristics of the treatment and control groups
mprehend more when reading a graphic novel than
reading text with no illustrations. To conduct an
should be roughly equivalent because the students
periment, the professor will assign some students to
are from a randomly chosen class.
control group with a reading assignment in
might not be roughly equivalent because the
aragraph form and other students to the treatment
students could have vastly different views about
roup with a reading assignment in graphic novel form.
graphic novels.
fterwards, all the students will take a quiz about the
eading to measure comprehension. To assign the
should be roughly equivalent because both groups
have a mixture of students with different current
roups, the professor will split the students into five
grades.
roups according to their current grade in the class: A,
3, C, D, or F. Within each group, half of the students
might not be roughly equivalent because the
be assigned to the treatment group with the
students were not labeled and randomly chosen for
graphic novel, and the rest will be assigned to the
each group.
control group with the paragraph.