A college student visits a large number of randomly selected stores in a city and in nearby small towns to collect data about the cost of bread. His theory is that the cost of bread is more variable in the city than in the small towns.

In the city, the sample MAD was 0.65, while in the small towns the sample MAD was 0.63.

Assuming there are no outliers or skew, do the results support the student's theory?

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Since the samples were large and randomly chosen, we can use the samples to understand the populations.

Because the sample MAD in the city is
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the sample MAD in the small towns, the results
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support the student's theory.