Using short cut method, find the mean, variation and standard deviation for the data :
Here, we apply the step deviation method with A = 25 and h = 10
To find: MEAN
Now, 
To find: VARIANCE
= 132
To find: STANDARD DEVIATION
= 11.49
1
Using short cut method, find the mean, variation and standard deviation for the data :
Here, we apply the step deviation method with A = 25 and h = 10
To find: MEAN
Now,
To find: VARIANCE
= 132
To find: STANDARD DEVIATION
= 11.49