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 ...

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

The one-sided alternatives are that the difference is greater than, or less than, the difference specified in the null hypothesis. To specify a box-and-whisker plot and a means plot in addition to the ...

In the article of Spriestersbach et al. (4), it was stated that, in contrast to the box, the definition of the so-called “whiskers” in the box plot diagram is not uniform. A diagram designated ...