It is 10.
For 2 3 4: σ=1
For 2 4 5 6 8: σ=2.2361
For 2 6 1 4 2 2 4 3 2: σ=1.5366
Consider thatxd= x- Arithmetic meand211-1.5 = -0.50.2522-1.5 = 0.50.25=0.5Arithmetic mean = (1+2)/2 =1.5Standard deviation=ie .5= 0.70now Considerxd= x- Arithmetic meand211-2=-1122-2=0033-2=11Arithmetic mean= (1+2+3)/3 = 2 =2Standard deviation= = (2/2) = 1So the Standard deviation can increasenow Considerxd= x- Arithmetic meand211-1.25=-0.250.062522-1.25=0.750.562511-1.25=-0.250.062511-1.25=-0.250.0625Arithmetic mean= (1+2+1+1)/4= 1.25 = .75Standard deviation= = (0.75/4) = 0.4330So the Standard deviation can decreaseStandard deviation can either decrese or increase or remains the same
Variance = 17.9047619 Standard Deviation = 4.23140188
5.142857143 is the mean.12.43956044 is the variance.3.526976104 is the standard deviation.
Standard deviation is the square root of the variance. Since you stated the variance is 4, the standard deviation is 2.
It is 10.
Standard deviation is the square root of the mean. The mean for this set is (2 + 4 + 3 + 7)/4 = 16/4 = 4; the square root of this is 2.
For 2 3 4: σ=1
Variance = 2.87 (approx).
7.087547766 is the standard deviation for those figures.
1. establishment of standard 2. fixation of the standard 3. compairing actual performance with standard performance 4. finding out the deviation 5. correcting the deviation
The SD is 2.
For 2 4 5 6 8: σ=2.2361
For 2 6 1 4 2 2 4 3 2: σ=1.5366