To find the 20th percentile, first sort the data in ascending order:
2, 3, 6, 6, 8, 8, 10, 12, 12, 13, 13, 14, 16, 17, 18, 18, 19, 20, 21, 21
The 20th percentile is at the 20% position in the data set, which is 0.2 * 20 = 4. Since the position is not an integer, you take the average of the 4th and 5th values:
The 20th percentile = (6 + 8) / 2 = 7
To find the 85th percentile, we follow the same steps:
The 85th percentile is at the 85% position, which is 0.85 * 20 = 17. Since the position is an integer, the 85th percentile is the value at the 17th position:
The 85th percentile = 20
Therefore, the value of the 20th percentile is 7 and the value of the 85th percentile is 20.
find the value of the 20th and 85th percentiles of the date. 19,10,8,6,12,8,18,21,20,3,18,13,6,2,14,13,12,16,17,21
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