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How Is Iqr Defined?

David Miller • • 6 min read
How Is Iqr Defined?

The IQR describes the middle 50% of values when ordered from lowest to highest. To find the interquartile range (IQR), ​first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.

What is IQR explain with example?

The interquartile range is equal to Q3 minus Q1. For example, consider the following numbers: 1, 3, 4, 5, 5, 6, 7, 11. Q1 is the middle value in the first half of the data set. ... The interquartile range is Q3 minus Q1, so IQR = 6.5 - 3.5 = 3.

How IQR is calculated?

How do you find the interquartile range?
  1. Order the data from least to greatest.
  2. Find the median.
  3. Calculate the median of both the lower and upper half of the data.
  4. The IQR is the difference between the upper and lower medians.
David Miller
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David Miller

David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.