Refer to Exercise 2.27 and the data on the consumer price index for various cities. Find the increase, for each city, by subtracting the 2007 value from the 2011 value.
(a) Obtain the five-number summary: minimum, Qlʹ Q2ʹ Q3' and maximum. Which city had the largest increase? Were there any decreases?
(b) Make a boxplot of the increases.
In Exercise 2.27

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