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A boxplot of a batch of 26 television prices. There is a horizontal scale with an arrow head, pointing right, at the right-hand end. It is labelled pounds sterling. The scale starts at 100 and is then marked in six intervals of 100, ending with 700. The first whisker on the boxplot starts at 170. The box starts at capital Q subscript 1, which is about 230 and capital M is at about 270. The box ends at capital Q subscript 3 at about 320. The second whisker ends at 429. There are two asterisks. One is at 649 and the other is at 699.

 Exercises on Section 3