2. jess thinks that people who sleep more than 6 hours the night before will
score much higher on a spelling test. she divides a group of 100 volunteers
into two groups. one group sleeps for a minimum of 6 hours the night before
the spelling test. the other group sleeps less than 6 hours. she gives the
same spelling test to all 100 volunteers. then, she grades them and
categorizes her results.
a. independent variable:
b. dependent variable:
c. experimental group:
d. control group: