The heights of the students of a school (measured to the nearest cm) were recorded as under.
Height (in cm)
150
155
158
160
164
168
No. of students
10
15
8
14
7
16
Find the mean height.
(Step-deviation method has been deleted for 2021)
[Question from M.L. Aggarwal book]
Dear Student,
Mean = Σfx / Σf
Height (x) | No. Of students (f) | fx |
150 155 158 160 164 168 | 10 15 8 14 7 16 | 1500 2325 1264 2240 1148 2688 |
Σf=70 | Σfx=11165 |
Mean = Σfx / Σf
Mean = 11165/70
Mean height = 159.5cm
Regards
Mean height = 159.5cm
Regards