Question
What is the standard deviation of the following sample data: 39, 31, 21, 29, 39, 18.
What is the standard deviation of the following sample data: 39, 31, 21, 29, 39, 18.
Homework Answers
Answer #1
Solution:
Given that,
39, 31, 21, 29, 39, 18.
)The mean of sample is 
x/n
= (39 + 31 + 21 + 29 + 39 +18 / 6)
=18
The sample mean is 18
Sample standard deviation is s
s = 
1/(n-1)(x
-
)2
= 1/5
(39 - 18 )2+ (31 - 18 )2+ (21 -
18)2+ (29- 18 )2 +( 39 - 18 )2+(
18 - 18)2
=
27.428571428571
=5.2372293656638 ( rounded)
The sample standard deviation is 5.24
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