Which statement best describes the interquartile range of this set of weights?{120 lb, 115 lb, 135 lb, 105 lb, 80 lb, 160 lb}

First order the weights from least to greatest: 80, 105, 115, 120, 135, 160. The first quartile is the median of the lower half, 105, and the third quartile is the median of the upper half, 135. The interquartile range is the difference between these quartiles, so it is the difference between the second and fifth elements in the ordered set.

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