Use Python to calculate the running mean and variance of incoming data (without Numby). Display the formula for mean and variance on the screen. The user should be prompted to enter a number and the mean and variance of all numbers entered thus far should be displayed. Output should look like this:

Enter a number: 1

Mean: 1.0 variance: 0

Enter a number: 2

Mean: 1.5 variance: .5

Enter a number: 3

Mean: 2.0 variance: 1.0

Enter a number: 4

Mean: 2.5 variance: 1.66667

Thanks!