What is the fastest way to find standard deviation?
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What is the fastest way to calculate standard deviation?
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2 Answers

Murali Krishna
, I was a Mathematics TEACHER teaching MATHEMATICS for stu
Answered 1 year ago · Author has 5.2K answers and 1.8M answer views
By practising calculation of Standard deviation
For 1 ungrouped data 2 Frequency distribution
Use calculator for calculations
Placing the data in order
X 2 4 6 8 10
n=5
Mean =Sum of observations/ n = 30/5 =6
D = DEVIATION of each observation of the data from its mean
Sum of D ^2=(2-6)^2+(4-6)^2+(8-6)^2+(10-6)^2=16+4+0+4+16= 40
Sd^2= Sum of D^2/ n-1 unbiased for n=5
Sd^2= 40/ 4 =10
Sd =3.16
Thankyou