87,89,90,90,98,99,99,101,102,103,104

Find the interquartile range.

See Related Questions below.

http://www.statisticshowto.com/articles/how-to-find-an-interquartile-range-in-statistics/

To find the interquartile range, we first need to find the upper quartile and the lower quartile.

1. Start by arranging the given numbers in ascending order:
87, 89, 90, 90, 98, 99, 99, 101, 102, 103, 104

2. Calculate the median of the entire dataset. Since we have 11 numbers, the median will be the value at the 6th position. The median is the average of the two central values. In this case, (90 + 98) / 2 = 94.

3. Next, we need to find the values for the lower and upper quartiles.
- The lower quartile (Q1) is the median of the lower half of the data. In this case, the lower half is the first 5 numbers. The median of these numbers (87, 89, 90, 90, 98) is 90.
- The upper quartile (Q3) is the median of the upper half of the data. In this case, the upper half is the last 5 numbers. The median of these numbers (99, 99, 101, 102, 103) is 101.

4. Finally, calculate the interquartile range (IQR) by subtracting Q1 from Q3:
IQR = Q3 - Q1 = 101 - 90 = 11.

Therefore, the interquartile range of the given dataset is 11.