Question: Set up the null and alternative hypothesis needed to attempt to establish that the advertisement increases the mean attitude score (that is, the mean postexposure

Set up the null and alternative hypothesis needed to attempt to establish that the advertisement increases the mean attitude score (that is, the mean postexposure attitude score is higher than the mean preexposure attitude score.

Pre-Exposure and Post-Exposure Attitude Score for an Advertising Study
Preexposure Postexposure Attitude
Subject Attitudes (A1) Attitudes (A2) Change (di)
1 50 53 3
2 25 27 2
3 30 38 8
4 50 55 5
5 60 61 1
6 80 85 5
7 45 45 0
8 30 31 1
9 65 72 7
10 70 78 8

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