Class mark is always the value midway between the upper limit and the lower limit. In this case given that class mark is 9.5 . Hence
upperlimit+lowerlimit2 = 9.5
Hence upper limit + lower limit = 9.5 x 2 = 19.
Class mark of a certain class interval is 30 and its lower class limit is 20. Then its upper class limit is
Class mark, upper limit and lower limit of a class can be connected by using:
The class midpoint is equal to:
(a) The average of the upper class limit and the lower class limit.
(b) The product of upper class limit and the lower class limit.
(c) The ratio of the upper class limit and the lower class limit.
(d) None of the above.