Hence median is 10.1, mean is 10.3 , SD= 0.72
What is median ?
Median is the central value of given number of observations
How to calculate?
First arrange values in ascending order
then
If number of observations are odd=[tex]\frac{n+1 }{2}[/tex]
If number of observations are even = [tex]\frac{n}{2}[/tex]
(where n is number of observations )
n= even =12
median is 12/2
Hence median is 10.1
What is mean?
Mean is the average value of sum of observations
How to calculate?
Formula= [tex]\frac{sum of observation}{number of observations}[/tex]
=[tex]\frac{124}{12}[/tex]
= 10.3
What is Standard deviation?
It is square root of arithmetic average of square of deviations calculated from mean value.
How to calculate?
=√∑[tex]\frac{(x-mean x)^{2} }{n}[/tex] =√[tex]\frac{6.33}{12}[/tex]=0.72
wind speed ( x- mean x) [tex]( x- mean x) ^{2}[/tex]
9.7 -0.6 0.36
10.0 -0.3 0.9
10.8 0.5 0.25
11.9 1.6 2.56
11.0 0.7 0.49
10.7 0.4 0.16
10.3 0 0
10.1 -0.2 0.4
9.9 -0.4 0.16
9.9 -0.4 0.16
9.6 -0.7 0.49
10.1 -0.2 0.4
s= 124 sum=6.33
Learn more about mean , median and standard deviation
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