The interquartile range of the data set of the heart rates of 10 adults is 21.
The interquartile range of a set of data is given as the difference between the lower median value and the upper median value of the data.
To calculate the interquartile range of the data set of the heart rates of 10 adults, we arrange the data first in increasing order as given below:
83, 87, 90, 92, 93, 100, 104, 111, 115, 121
The data set is an even dat set and is divided into five values each.
The lower median of the set is obtained as follows:
83, 87, 90, 92, 93; lower median value = 90
The upper median of the set is obtained as follows:
100, 104, 111, 115, 121; upper median value = 111
The interquartile range = 111 - 90
The interquartile range = 21
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