Question

Calculate the sum of squared deviation, variation and standard deviation from the following data set. 45...

Calculate the sum of squared deviation, variation and standard deviation from the following data set.
45
44
48
42

Homework Answers

Answer #1
S.No X (X-x̄) (X-x̄)2
1 45 0.25 0.063
2 44 -0.75 0.563
3 48 3.25 10.563
4 42 -2.75 7.563
Σx 179 Σ(X-x̄)2= 18.7500
x̄=Σx/n 44.75 s2=Σ(x-x̄)2/(n-1)= 6.25000
                          s=√s2    = 2.5000

from above sum of squared deviation =18.75

variation =6.25

standard deviation =2.5

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