Swati recorded this data set, which contains an outlier. 163, 97, 184, 199, 169, 175 What numbers represent the lower and upper quartiles?

First arrange the values from least to greatest: 97, 163, 169, 175, 184, 199. The lower half is 97, 163, 169, whose middle value is 163; the upper half is 175, 184, 199, whose middle value is 184. Therefore, the lower quartile is 163 and the upper quartile is 184, which is choice D.

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