# find the standard deviation step by step. that is find the deviation of each observation from the mean, square the deviations then obtain the variance and the standard deviation.i found the mean : 10.05i need help finding the standard deviation and the variance

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find the standard deviation step by step. that is find the deviation of each observation from the mean, square the deviations then obtain the variance and the standard deviation.
i found the mean : 10.05
i need help finding the standard deviation and the variance

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Step 1

To find standard deviation we need to do following steps.

FInd the mean.

For each data point, find the square of its distance to the mean.

Sum the values from Step 2.

Divide by the number of data points-1.

Take the square root.

The formula for standard deviation (sd) is,

Step 2
Step 3

Lets take one example.

Suppose data set contains of si...

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### Statistics 