Definition:Semi-Interquartile Range

Definition

The semi-interquartile range is a measure of dispersion in statistics.

Let $Q_1$ and $Q_3$ be first quartile and third quartile respectively.

The semi-interquartile range is defined as:

$\dfrac {Q_3 - Q_1} 2$

That is, half the interquartile range.

Also known as

A semi-interquartile range is also known as a quartile deviation.

Also see

• Results about semi-interquartile ranges can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): dispersion
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): interquartile range
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): quartile deviation
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): semi-interquartile range
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): dispersion
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): interquartile range
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): quartile deviation
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): semi-interquartile range