value S = Range R = L S = Coefficient of range = L S L S Coefficient of range = Example . Find the range of the following distribution. Age (in years) - - - - - - Number of students Solution Here Largest value L = Smallest value S = Range R L S R = Years Example . The range of a set of data is .
and the largest value is . . Find the smallest value. Solution Range R = Largest value L = Range R = L S .
= S S Therefore, the smallest value is . . . .
Deviations from the mean For a given data with n observations x x x n , ¼ , the deviations from the mean x are - , x - , …, x n - . . Squares of deviations from the mean The squares of deviations from the mean x of the observations x x x n ¼ are ) ,( ) ,...,( or