the difference between the highest and lowest data values in a data set is called the
The range is very easy to calculate because it is simply the difference between the largest and the smallest observed values in a data set. Thus, range, including any outliers, is the actual spread of data. Range = difference between highest and lowest observed values A great deal of information is ignored when computing the range, since only the largest and smallest data values are considered. The range value of a data set is greatly influenced by the presence of just one unusually large or small value (outlier).