Determine whether the range or interquartile range best describes the spread of a dataset.
The times (in seconds) for a high school boys’ 100-meter race:
11.0 11.2 11.7 12.2 12.4 12.6 12.8 12.9 13.1 13.3 13.8 14.2 14.3 14.3 16.5 17.6 18.0
1 answer
In this case, the interquartile range would best describe the spread of the dataset. The interquartile range is a measure of variability that considers only the middle 50% of the data. It is calculated by finding the difference between the first quartile (Q1) and the third quartile (Q3).
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