Question

Please help! I need help with mean deviation!!

Answer 1

19, 12, 16, 10, 8, 8, 14, 15, 24

mean =

mean absolute deviation =

Answer 2

mean is sum of all numbers divided by the total numbers.... and the mean absolute deviation is the Mean Deviation = Σ|x - μ| / N....

Answer 3

I know what to do for the mean I just don't understand what to do for the Mean deviation

Answer 4

hmm ok... do you know, how to find here "μ"...?

Answer 5

what?

Answer 6

can you find the "μ" in the formula of mean absolute deviation...?

Answer 7

I am sorry but, I am on a new lesson and I don't really know deviation is and I don't know what you mean by that symbol.

Answer 8

ok... then i have a good web for you... please have a look here... you will be cleared with all the questions... ok...

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

Answer 9

ok

Answer 10

Oh I already saw this

Answer 11

I understood the table thing but, I have no table I have just numbers I am confused

Answer 12

hmm... here we have the data as 19, 12, 16, 10, 8, 8, 14, 15, 24... and it's mean is 14... ok... now how we will carry on this is to minus this mean from all above values... like this...

19-14= 5
12-14= -2 ans so on.....

then add up all these results and divide it by the total numbers of terms... that will be the mean absolute deviation.... got it now...

Answer 13

why are we subtracting numbers like 19 and 14??

Answer 14

we are doing so as this is in the formula of mean absolute deviation.... |x - μ|...

Answer 15

ok can you go step by step for me please and tell me what those symbols are that you are using?

Answer 16

i have explained all...

Answer 17

sorry I am still not understanding :(

Answer 18

oh :(

Answer 19

ok wait... i am solving it here...

Answer 20

kk

Answer 21

sorry... i have problem with my page now... i am trying...

Answer 22

ok..you got your mean of 14. Now take your original numbers and subtract 14 from all of them. Disregard the signs.
19 - 14 = 5
12 - 14 = 2 (see how I disregarded the sign)
16 - 14 = 2
10 - 14 = 4
8 - 14 = 6
8 - 14 = 6
14 - 14 = 0
15 - 14 = 1
24 - 14 = 10

Now take your results, and find the average
(5 + 2 + 2 + 4 + 6 + 6 + 0 + 1 + 10) / 9 = your mean deviation

Answer 23

ok I get everything except that last part where you said to take the results and find the average what does that mean?

Answer 24

you know how you found the average (mean) in the first part....well...do the same thing with your new numbers....add them up, then divide by how many there are

Answer 25

oh I see!! :)

Answer 26

Thanks! You explain really well! :D

Answer 27

if you still have trouble...this explains it easy..
http://www.mathsisfun.com/data/mean-deviation.html

Answer 28

ya I saw that but, I did not understand as well as you explained it lol!

Answer 29

Thank you!

Answer 30

:) happy to help

Answer 31

Thank you paki as well for trying your best to help me

Answer 32

oh I have a question texaschic101

Answer 33

ask away

Answer 34

So first I find the mean and get 14 (understand that!) now you said take the original numbers and subtract them from 14 what if the original numbers are larger than 14?

Answer 35

example : 12 - 14 = 2 (disregard the sign)
15 - 14 = 1
1 - 14 = 13
understand ?

Answer 36

yes! so it is ok if the number comes out negative?

Answer 37

just make it positive

Answer 38

like 14-19=-5

Answer 39

it would be 14 - 19 = 5 (take away the negative)

Answer 40

oh ok so then after subtracting every number from 14 I divide all those numbers by how many numbers there are and then get mean deviation

Answer 41

what you doing is finding the distance between the number and the mean. Doesn't matter if it is negative....you just want the distance...so keep it positive...kind of like the absolute value.
And for your question...yes...add up the new numbers, and then divide by how many numbers there are

Answer 42

ok Thank you if I have any questions later on do you mind if I send you a message?

Answer 43

well..I have to go somewhere right now...but I will get back on soon

Answer 44

ok Thanks!! :)

Answer 45

sure thing :)