Use the provided data to examine whether the commercial improved the university’s image.
A major university would like to improve its tarnished image following a large on-campus scandal. Its marketing department develops a short television commercial and tests it on a sample of n = 10, the first ten students who entered a housing commons area who agreed to participate. Attitudes about the university are measured with a short questionnaire, both before and after viewing the commercial. Attitudes were on a scale of 0 – 20, which higher numbers reflecting better attitudes. Use the provided data to examine whether the commercial improved the university’s image. The data are as follows:
Person
X1 (before)
X2 (after)
A
15
15
B
11
13
C
10
18
D
11
12
E
14
16
F
10
10
G
11
19
H
10
20
I
12
13
J
15
18
