Question 1198238: Consider a set of data: 5, 4, 3, 5, 5, 4, 3, 2, 1, 0, 5, 4, 5, 3, 2.
What is the interquartile range of the above data?
Answer by MathLover1(20850)   (Show Source):
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given:
to calculate Quartiles
5, 4, 3, 5, 5, 4, 3, 2, 1, 0, 5, 4, 5, 3, 2
1.Order your data set from lowest to highest values
0, 1, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5
2.Find the median. This is the second quartile  .
0, 1, 2, 2, 3, 3, 3, | |, 4, 4, 5, 5, 5, 5, 5
3.At split the ordered data set into two halves.
0, 1, 2, 2, 3, 3, 3, ||, 4, 4, 5, 5, 5, 5, 5
4.The lower quartile  is the median of the lower half of the data.
0, 1, 2,  , 3, 3, 3
The upper quartile  is the median of the upper half of the data.
4, 4, 5, , 5, 5, 5
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