The marks in a subject for 12 students are as follows: 31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29.
For the given data, find the
(a) Range (b) Mean (c) Median (d) Mode
(a) 25
(b) 30.41
(c) 33
(d) 35
(a) Range = 42 − 17 = 25.
(b) Mean = 366/12 = 30.41.
(c) Ordered data: 17, 18, 23, 25, 29, 31, 35, 35, 35, 37, 38, 42.
Median = average of 6th and 7th terms = (31+35)/2 = 33.
(d) Mode = 35 (appears most often).