The Total solution for NCERT class 6-12
Find the mean, andstandard deviation for the following data:(i)
Year render:
10
20
30
40
50
60
No. of persons (cumulative)
15
32
51
78
97
109
(ii)
Marks:
2
3
4
5
6
7
8
9
11
12
13
14
16
Frequency:
1
0
(i)(ii)