Consumers were asked to "rate" the taste of three popular brands of yogurt that have been modified to include fibre. The data are shown in the table below. Are there differences in the results among the three brands?
a. What nonparametric method is appropriate for analyzing these data?
b. State the null and alternative hypotheses.
c. Perform the test and state your conclusion at α = 0.05.
d. If these data did satisfy the assumptions for performing ANOVA, what are the disadvantages of using this nonparametric method instead?
Definitions:
Perfectly Competitive
Describes a market structure where numerous small firms compete against each other, and products are considered perfect substitutes.
Average Rate
A mathematical mean or typical value of a set of rates, often used in reference to interest rates, pricing, or other financial statistics.
Market Demand
The total quantity of a product or service that is desired by all potential consumers in a market at various price levels.
Competitive Industry
An industry landscape where multiple firms compete against each other, often leading to innovation and lower prices for consumers.
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