Question

How do you calculate the average difference of 2 means that do not have the same number of values

Answer 1

okay

Answer 2

listen my friend u must take a weighted avg

Answer 3

ok how do i do this?

Answer 4

let us suppose that
there are n values of mean1
and k values of mean 2
then your new average is
mean1*n + mean2*k
-----------------
n+k

Answer 5

do you know why that would work

Answer 6

no i dont can you please explain it

Answer 7

okay i can kind of show u like a picture way to look at it there are a number of ways to look at it

Answer 8

suppose i gave you like 12 values okay
30
20
10
..
.
.
50

Answer 9

now to take the average of these 12 values u can add up all the values and then divide by 12

Answer 10

or suppose you knew the average of the first 4, and the average of the last 8 already

Answer 11

then u know that adding up the first 4 numbers, that is the same thing as the average * 4

Answer 12

and adding up all the 8 numbers separtely is also the same thing as the average of those 8 numbers * 8

Answer 13

so instead of adding up all the numbers u can see wat the 4 numbers shud add up to
and what those 8 numbers shud add up to, so u already now the total of the 12 numbers, now u only divide by 12 to see the avg of everything

Answer 14

what if you have the same amount of data

Answer 15

what do you do?

Answer 16

doesnt change anything

Answer 17

if u know avg of 6 and the avg of the other 6

Answer 18

what do you do? divide by 12?

Answer 19

we will just see what the first 6 shud add up to if u add them separetly.. which is just 6*the mean of them

Answer 20

then 6*the meanof the other

Answer 21

nd divide by 12

Answer 22

okay like this

Answer 23

im still confused