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Experts plzz answer ques 25

Experts plzz answer ques 25 Standard Deviation
Individual Series
21. Calculate the standard deviation from the following values: 8, 9, 15, 23, 5, 11, 19, B, 10, 12.
{Standard deviation 528
22. Find the standard deviation for the following data: 3, 5, 6, 7, 10, 12, 15, 18.
{Standard deviation = 4.87}
23. Find out the standard deviation of the height of 10 men given below: 160, 160, 161, 162, 163, 163
163, 164, 164, 170.
Discrete Series
24. Calculate standard deviation of the given below:
{Standard deviation = 272)
Size
Frequency
3
3
4
7
5
22
6
60
7
85
8
32
{Standard deviation -
25. Find the value of standard deviation and coefficient of variation from the following:
Variables
Frequency
10
6
20
8
30
16
40
15
50
32
60
11
9
8
- 1.149)
70
12
(Standard deviation = 16.43; Coefficient of SD 37.34}
26. Measurements are made to the nearest cm. of the heights of 10 children. Calculate mean and standard
deviation.
Height (cms)
No. of children
60
2
61
o
62
15
63
29
64
25
65
12
66
10
67 68
3
4
{Mean = 63.89 cms; Standard deviation = 1.6"'