Question

Stats help required

Answer 1

probability

Answer 2

Not probability

Answer 3

"infect"?, who wrote this question

Answer 4

infact*

Answer 5

@modphysnoob

Answer 6

GM is geometric mean?

Answer 7

(wrong_GM*10)-wrong_number+right number
---------------------------------------
10

Answer 8

thanks

Answer 9

@modphysnoob

Please can you tell me where you got this formula from?

Answer 10

@kropot72 Please help

Answer 11

If the Wrong GM is 12.9,What is the wrong number here?

Answer 12

When any number of quantities are in a geometric progression, the terms intermediate between the first and the last are called the geometric means between those two terms.
It is incorrect to state a single value for the geometric mean of 10 observations. There are 8 values of geometric mean.

Answer 13

You mean to say the question is wrong?

Answer 14

@kropot72

Answer 15

Okay so the geometric mean is going to be: \[ \Large
\sqrt[n]{\Pi_i^n x_i}
\]Right?

Answer 16

So first we take the GM to the power of 10, to get it in the form: \[\Large
\Pi_i^nx_i
\]

Answer 17

Then we divide out our wrong value and multiply in the right value.

Answer 18

Then we take it to the power of \(1/10\) (the 10th root) to get it back as a geometric mean.

Answer 19

@hba It's all about reverse engineering.

Answer 20

@wio
I am not actually get it :(

Answer 21

Okay do you know what geometric mean is?

Answer 22

Yes GM=\[\sqrt[n]{(x_1+x_2+........x_n)}\]

Answer 23

Wait are you sure about that?

Answer 24

Yeah

Answer 25

\[\Large
GM = \left(\prod_{i=1}^n a_n \right)^{(1/n)}
\]

Answer 26

It's not a sum, you are multiplying them

Answer 27

Oh yeah sorry

Answer 28

Okay so \[ \Large
GM^n =\prod_{i=1}^na_i
\]

Answer 29

If we want to say that \(a_k\) is wrong and should be replaced with \(b\), then:
\[\Large
\frac{b}{a_k}GM^n =\frac{b}{a_k}\prod_{i=1}^na_i
\]Just divide it out and multiply in the new one.

Answer 30

I am sorta getting it

Answer 31

\[ \Large
GM_2 = \left(\frac{b}{a_k}GM^n \right)^{1/n}
\]

Answer 32

What is this GM_2 for?

Answer 33

The new geometric mean after replacing one of the values.

Answer 34

I am really sorry i may sound stupid because Stats is something new for me.

Answer 35

You don't get what I did?

Answer 36

Well lemme tell you what i got.Wait a sec

Answer 37

i did this,