Question

What happens to the mean of the data set {2, 4, 5, 6, 8, 2, 5, 6} if the number 7 is added to the data set?

Answer 1

Answer:

It increases

Step-by-step explanation:

The mean of the given data set of 8 values is 4.75 ($\frac{2+4+5+6+8+2+5+6}{8}$)

Adding 7 into the data set also increase the number of data points to 9, so the mean becomes:$\frac{2+4+5+6+8+2+5+6+7}{9}$, which is equal to 5

Hope this helps