Question

MEDAL WILL BE AWARDED!!! PLEASE HELP



Find the mean absolute deviation for the following set of high temperatures recorded across the United States on August 21.
{87, 72, 93, 91, 64, 86, 95}

Answer 1

@jim_thompson5910

Answer 2

What is the mean of this data set?

Answer 3

I got the mean of 84.

Answer 4

I seemed to do that step well, but then when it came to adding all the absolute values, the mean keeps on ending up as a decimal.

Answer 5

now subtract each value from the mean

make those differences positive (so use absolute value)

Answer 6

okay, so maybe you may notice the mistake, if i did get one.
87-84=3
72-84=-8
93-84=9
91-84=7
64-84=-20
86-84=2
95-84=11

so i added the absolute values:
3+8+9+7+20+2+11=60
i am pretty sure that i got that one incorrect.

@jim_thompson5910

Answer 7

72-84 should be -12 not -8

Answer 8

the answer is 12 right?

Answer 9

that's not the final answer

Answer 10

I'm just correcting part of your scratch work

Answer 11

wait, i am kind of confused in here. am i correct?

Answer 12

go back in how you subtracted

in your work, you wrote "72-84=-8"

when you *should* have this "72-84=-12"

Answer 13

yes that's what i did. then i added all the numbers up, and then divided it by 7 to get the mean, and got 12.

Answer 14

the answer is still not 12

Answer 15

so what's the next step?

Answer 16

you add up the absolute value differences (ie the distance each value is from the mean)

then divide by 7

Answer 17

here's a page with an example

http://www.mathsisfun.com/data/mean-deviation.html

Answer 18

i did and got the answer as 84, divided it by 7 = 12?

Answer 19

look over that page I posted

Answer 20

i am not getting this. so please can you tell me where i got my error?

Answer 21

please hurry up i have to go somewhere. ..

Answer 22

you have these distances:

3,12,9,7,20,2,11

average them to find your answer

Answer 23

so i add all of them and then divide it by 7?

Answer 24

please hurry ...

Answer 25

yes, add them up and divide by 7