Question

Find the mean of the following: 158, 213, 107, 213, 213. Round your answer to one decimal place.

Answer 1

which number looks like its about the middle of the pack?

Answer 2

107

Answer 3

then id start by subtracting 107 from all the amounts to make things smaller

Answer 4

whats the answer

Answer 5

158, 213, 107, 213, 213

51, 106, 0, 106, 106

now add them, or make them even smaller

if we add, 318+51 = 369

the answer is what we get at the end of the process

Answer 6

id prolly subtract another 50 tho to make the shift 157

1, 56,-50, 56, 56 ; add them up to get

7+112 = 119

and since there are 5 numbers

what is 119/5 ?

Answer 7

23.8

Answer 8

good, then lets shift it back ... add 157

Answer 9

180.8

Answer 10

thats what i like; lets test it out

mean (158, 213, 107, 213, 213)

http://www.wolframalpha.com/input/?i=mean+%28158%2C+213%2C+107%2C+213%2C+213%29

Answer 11

by subtracting (shifting) that values to smaller amounts, it makes adding them easier; once we find the mean of the smaller set, we can just shift it back again