The interquartile range shows the size of the span between the middle half of the numbers in a set. The interquartile range is calculated by subtracting the number at the lower quartile from the number at the upper quart... More »

The interquartile range, or IQR, can be found after the median has been determined by dividing the data sets that are above and below the median in half, which divides the entire set into quarters, and then combining the... More »

To calculate the interquartile range in Microsoft Excel, first enter the values for which you want to calculate the interquartile range in one single column. To calculate the first quartile, select a blank cell, and ente... More »

The interquartile range, or IQR, can be found after the median has been determined by dividing the data sets that are above and below the median in half, which divides the entire set into quarters, and then combining the... More »

The "mean" in math refers to the average value of a set of numbers. It is calculated by adding all the numbers in a set and then dividing that sum by the total amount of numbers in the set. More »

Mean, median and mode are different ways of determining the average from a set of numbers. Range gives the difference between the highest and lowest values. More »

The mode of a set of numbers is the value which occurs the most often in the set. For example, the mode of {1, 2, 3, 2, 4} is 2, since it occurs twice. More »