# Mean Variance and Standard Deviation examples and calculator in data mining

### Enter the values of which you want to find MEAN VARIANCE AND STANDARD DEVIATION:

Enter first value here:-

Enter second value here:-

Enter third value here:-

Enter fourth value here:-

## Formula

Formula for Mean
mean = (A + B + C + D) /4

Formula for Varience of Data
VA=(A-mean)
VB=(B-mean)
VC=(C-mean)
VD=(D-mean)
sqrA= (VA*VA)
sqrB= (VB*VB)
sqrC= (VC*VC)
sqrD= (VD*VD)
Sum = sqrA + sqrB + sqrC + sqrD
Varience = Sum/4

Formula for Standard Deviation
Standard Deviation = sqrt(Varience)

## EXAMPLES

#### EXAMPLE 1

Values Mean of Data Varience Of Data Standard Deviation of Data
12, 15, 17, 19 15.75 6.6875 2.5860

#### EXAMPLE 2

Values Mean of Data Varience Of Data Standard Deviation of Data
105, 157, 193, 185 160 1187 34.4528
Fazal Rehman Shamil
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