Consider the price of a hotel room in 20 U.S. cities (Table 5.5.8).
a. Find the average price of a major-city hotel room in the United States, based on this data set.
b. Find the sample standard deviation of these prices.
c. What does the standard deviation tell you about hotel prices in major cities in the United States?

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TABLE 5.5.8 Hotel Room Prices City Atlanta Boston Chicago Cleveland Dallas Denver Detroit Houstorn Los Angeles Hotel Price Miami Minneapolis New Orleans New York Orlando Phoenix Pittsburgh St. Louis San Francisco Seattle Washington, DC $176 244 251 127 152 145 158 179 174 136 155 169 296 129 191 137 141 227 174 224