In grouped data, greatest value = 21, lowest value = 3, and number of intervals = 3, then size of class is ______?
In grouped data, greatest value = 21, lowest value = 3, and number of intervals = 3, then size of class is ______?
Explanation
To find the size of the class interval:
Size = (Greatest value - Lowest value) / Number of intervals
= (21 - 3) / 3
= 18 / 3
= 6