The difference between the highest and lowest values of the observations is called:
Range
Explanation for correct option:
(b) Range
The difference between the highest and lowest values of the observations is called range. It is given by .
Explanation for Incorrect option:
(a) Frequency
The number of times a repeated event occurred as per the unit of time is known as frequency.
(c) Mean
The mean is the sum and average of the given terms. It is given by
(d) The class-intervals
The class interval is defined as the difference between the upper and lower class limit. It is given by .
Therefore, option (b) range is the right answer.