This is the measure of the spread of squares within a set of data. It is given by the formula:
Sample Standard deviation = `S=root_((sum_(i=1)^n(x_i-barx)^2)/(n-1))`
This can be broken down to 4 steps
STEP 1: Calculate the mean, `barx`, as we did above.
STEP 2: Subtract the mean from each element in the data and square the difference
STEP 3: Add the squared differences and divide the total obtained by the total number of elements minus 1, that is, (n-1).
STEP 4: Obtain the square root of the result obtained in step 3. This will be your standard deviation.
For the data you provided above,