Question

The mean of 9 numbers is 5, if 7 is added to them the new mean

Answer 1

Step-by-step explanation:

then mean also increase by 7

so new mean will be =5+7= 12

if you add 7 to every number only

Answer 2

Step-by-step explanation:

To find the new sample mean, we must determine how the values for n and will be changed by a new score. We begin with the original sample and then consider the effect of adding the new score. The original sample had n=5 scores, so adding one new score will produce n=6. Similarly, the original sample had .

Count how many numbers are in the set. There are 5 numbers in the set, so n=5 . Add the numbers in the numerator. Then divide.

i hope this helps to you