Question

1.
The mean of 5 numbers is 4. What happens to the mean if the number 13 is added to the data set?
2. The mean of 5 numbers is 4. What happens to the mean if the number 10 is added to the data set?

Answer 1

1. If the mean of the 5 numbers is 4, you know that the sum of all numbers is 5*4 or 20. Add 13 to 20 (33) and divide by the number of numbers in your data set(6). Then compare 4 to your resulting mean,
2. Do the same thing expect use 10 instead of 13 and compare.

Answer 2

Thanks, I needed the answer for a timed test my teachers gave me over winter break.

Answer 3

Well that's not good :/