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Lesson: Finding the Quartiles of a Data Set

The first quartile of a data set is the middle number between its median and lowest value, the second is the same as its median, and the third is the middle number between its median and highest value. Learn how to find the median and upper and lower quartiles of a data set.

Worksheet: Finding the Quartiles of a Data Set • 15 Questions

Q1:

Determine the median and quartiles of the following set of data: 56, 55, 90, 50, 41, 84, 68, 75, 92, 50, and 71.

A The median is 68, and the quartiles are 50 and 84.
B The median is 68, and the quartiles are 52.5 and 79.5.
C The median is 71, and the quartiles are 55 and 90.
D The median is 69.5, and the quartiles are 50 and 84.

Q2:

Determine the median and quartiles of the following set of data: 1.8, 1.6, 1.1, 2.4, 0.6, 1.3, 2.9, 1.5, 0.4, 1.9, 2.9.

A The median is 1.6, and the quartiles are 1.1 and 2.4.
B The median is 1.6, and the quartiles are 0.6 and 1.9.
C The median is 1.8, and the quartiles are 1.1 and 2.4.
D The median is 1.6, and the quartiles are 1.3 and 2.9.

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