Scenario 1

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 improvedthe 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

1. In this specific scenario, what is the independent variable? Is it between or within subjects? How many levels does it have, and what are they?

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1. In this specific scenario, what is the dependent variable? What is its scale of measurement (nominal, ordinal, or scale)?

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1. Paste all relevant statistical output in the space provided below:

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1. Which appropriate graph in SPSS would be best and paste it in the space provided below:

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Present the results. This includes a full write-up to include a complete statistical notation as shown in the weekly presentations. The write-up also needs interpretation. If significant, state how. If it is not significant, what does that mean in layman's terms?

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1. Do you think this experiment has more internal validity or external validity? Explain your answer. (You may want to review chapters 9-10 in your Jackson e-book).

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