Mean = &sum Xⁱ/N

Standard Deviation = ∑ ((Xⁱ - X_mean)² / (N-1) ) ^1/2

N = number of points.

Remember to take the square and square root for the standard deviation.

If you are doing the calculations by hand, it is probably best to make a table.

Also, be sure to carry the appropriate number of significant figures through the calculation. In practice, if using a machine to do the calculations, you may find it convenient to carry a few more digits than you need throughout the calculation and then round only at the end.

Correct !