The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first ...

The interquartile range (IQR) is an important concept ... determining whether your data has any outliers. The box plot then draws two whiskers or lines representing the maximum and minimum values ...

Sampling data - Intermediate & Higher tier - WJEC Cumulative frequency – Intermediate & Higher tier - WJEC Averages and range - WJEC Discussing results - WJEC Mean, median and mode ...