An interquartile range calculator or formula helps to highlight a normal distribution and find the median, where greatest density of values lie in the central dataset spread.

Discover what quartiles are in statistics, how to calculate them, and see examples to help you interpret data more ...

Learn how to calculate the interquartile range from a variety of different data types and draw and interpret box-and-whisker diagrams.

We discourage the use of a diagnostic for normality: the interquartile range divided by the standard deviation. This statistic has been suggested in several introductory statistics books as a method ...

GCSE Edexcel Analysing data - Edexcel Range In statistics there are three types of average: the mean, the median and the mode. Measures of spread such as the range and the interquartile range can ...

Others members of the family include the inter-quartile range, the mode and the range. Those three I explain here and in a later column I will turn to standard deviations.