C. People who saw an ad are compared to people who didn’t see the ad on their attitude
toward the brand
D. Random assignment is used to divide participants into the control and experimental
groups; a control group responds to a pre-test on brand preferences and a post-test; an
experimental group responds to a pre-test, is exposed to a commercial for the brand,
and responds to a post-test
E. Random assignment is used to divide participants into control and experimental
groups; the experimental group is exposed to a commercial and then attitude toward the
brand is measured; attitude toward the brand is also measured for the control group
The hypothesis that the number of hours worked is related to student grade point
average is a _____ hypothesis.
A. null
B. one-tailed test
C. two-tailed test
D. test of proportions
E. test of means
According to a recent poll on the Prevention magazine website:
– 56% reported that their doctor never discusses weight.