Find the mean of this set of numbers. 7, –9, 6, –10, –13, –5

Question

77

-4

4

-24

Answer 1

Ok, I added these numbers 3 times, and while you moderators are "reviewing my answer without providing a reason so I can fix it, the student is getting the wrong answer".

 

 

Mean = sum of all values / # of values

 

Add them all up.

 

7-9+6-10-13-5+77-4+4-24 = 29

 

29/10 numbers = 2.9

 

 

Answer 2

Hi Paula,

Apologies! I initially and inexplicably included a minus sign. The correct answer is indeed 2.9, not -2.9. The answer has been edited.

A mean (also known as an average) for a set of numbers is calculated by adding up the terms, then dividing by the number of terms.

In this case,

mean = (7+(-9)+6+(-10)+(-13)+(-5)+77+(-4)+4+(-24))/10

= 29/10

= 2.9