Explanation:
β° Range : It is the simplest method or measuring the variations. A range is defined as the difference between the largest and the smallest value of distribution. If the data are arranged in ascending or descending order , then the difference between the largest and smallest values is called the range. The range is defined by :
![\boxed{\large{ \sf{Range = \: Largest \: value \: ( \: L\: ) \: - \: Smallest \: value \: ( \: S \: )}}}](/tpl/images/1177/7390/344ab.png)
In our case, the largest value is 21 & smallest value is 13. Plug the values :
β’ ![\large{ \tt{21 - 15}}](/tpl/images/1177/7390/d5b09.png)
β’ ![\boxed{ \boxed{\large{ \tt{6}}}}](/tpl/images/1177/7390/591b1.png)
Hope I helped ! β‘
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