Pizza prices. A company that sells frozen pizza to stores in four markets in the United States…

Pizza prices. A company that sells frozen pizza to stores in four markets in the United States (Denver, Baltimore, Dallas, and Chicago) wants to examine the prices that the stores charge for pizza slices. Here are boxplots comparing data from a sample of stores in each market:

a) Do prices appear to be the same in the four markets? Explain.

b) Does the presence of any outliers affect your overall conclusions about prices in the four markets?

 

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