## Mean, Variance and Coding - Statistics 1

__Coding for the Mean__Whatever number you multiply, divide, subtract, or add to each of the values in your data set, the mean will be affected in the same way.

__Coding for the Variance__The variance is not affected by adding or subtracting numbers to each value in the data set. It is only affected by multiplying or dividing each number in your data set. The variance multiplies by the square of the number that you multiply each value in the data set. E.g. if each value in the data set is multiplied by 4, the variance would multiply by 42 which is 16.

__Coding for the Standard Deviation__The Standard Deviation is not affected by adding or subtracting numbers to each value in the data set. It is only affected by multiplying or dividing each number in your data set. The standard deviation multiples by the same number that you multiple each value in the data set. E.g. if each value in the data set is multiplied by 4, the standard deviation would also multiply by 4.