The following observations represent the weekly pocket money (in rupees) received by seven students of a coaching class:
17, 12, 19, 25, 15, 17, 12.
(i) Define the term “range” as used in statistics.
(ii) State the symbolic formula used to compute the range for ungrouped data.
(iii) Identify the maximum and minimum pocket-money values from the data given.
(iv) Using your results from part (iii), find the range of the pocket-money distribution.