EXAMPLE 9.8 Music and Wine Sales
CASE 2.2 In the market research study of Case 2.2 (page 104), we compare three populations:
- Population 1: bottles of wine sold when no music is playing
- Population 2: bottles of wine sold when French music is playing
- Population 3: bottles of wine sold when Italian music is playing
We have three samples, of sizes 84, 75, and 84, a separate sample from each population. The null hypothesis for the chi-square test is
: The proportions of each wine type sold are the same in all three populations.
The parameters of the model are the proportions of the three types of wine that would be sold in each of the three environments. There are three proportions (for French wine, Italian wine, and other wine) for each environment.