Lesson: Interquartile Range

In this lesson, we will learn how to find the interquartile range.

Sample Question Videos

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Worksheet: 19 Questions • 5 Videos

Q1:

The Bureau of Labor Statistics published the over-the-month percent change in the price index for imports from April 2,004 to December 2,004. Given that the table shows the published data, calculate the interquartile range.

Month	April	May	June	July	August	September	October	November	December
Index				0.9	2.0		1.2		0.4

Q2:

The table shows some non-English languages spoken by some of the US population. Determine the range and interquartile range of the data.

Language	Greek	Armenian	Bengali	Urdu	Spanish	Hindi	Korean	Hebrew
Number of Speakers	304,900	246,900	800,000	373,800	37,580,000	648,900	1,410,000	216,300

Q3:

Find the interquartile range of the data.

Score	16	14	19	36	17	18	39
Frequency	2	3	5	3	1	3	5

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