Data formed by aggregating individual observations of a variable into groups, so that a frequency distribution of these groups serves as a convenient means of summarizing or analyzing the data.

It refers to the number of times a particular data point occurs in the set of data.

In statistics for a given data set , it is the difference between the highest and lowest values.

What is the range of the given set of data? 24 , 12 , 19 , 15 , 11 , 23 , 18 , 30 , 17 , 19 , 17 , 17 , 24 , 12 , 20