Answer:
1. Mean: 18 Range: 143
Explanation:
So I can't do all these problems for you but I'll do the first one.
So basically to find the mean add all of the numbers together and divide by the number of numbers.
For example, if the numbers were 1, 2, 3, 4 you would do:
1 + 2 + 3 + 4 = 10
divide by the number of numbers (4 numbers):
10 / 4 = 2.5
so the mean of that example set is 2.5
The range of a set of numbers is the difference between the least and greatest:
From the example before, the set 1, 2, 3, 4 would have a range of 4 - 1 = 3.
For question 1, you start by adding all the numbers:
you get 162.
Then, divide by 9 because there are 9 numbers:
162/9 = 18
Range: the least number is -76 and the greatest number is 67, so the range is:
67 - (-76) = 143