Gerometric mean help!!! (GOT IT. THANKS)

[FFactory0x]

THANKYOU

 

[Orsorum]

ATOT is not a homework forum.

 

[FFactory0x]

I understand that but someone can help me out. This is the only problem i am looking back on without a clue

 

[chuckywang]

geometric mean of n numbers, a1, a2, a3, a4....an is:

(a1*a2*a3*...*an)^(1/n)

 

[FFactory0x]

still dont get it

 

[chuckywang]

Originally posted by: FFactory0x
still dont get it

what don't you get? you got five numbers...the geometric mean is the fifth root of the product of those numbers.

 

[FFactory0x]

so times them all together

(1.19*1.08*.88*.97*1.15)^.2 -1

 

[FFactory0x]

How do i punch the 5th root into my ti-83

 

[dighn]

Originally posted by: FFactory0x
so times them all together

(1.19*1.08*.88*.97*1.15)^.2 -1

why did you add 1 to all the numbers? and what's with the -1?

just mutiple all the numbers together and take to the 1/5 power

 

[chuckywang]

Originally posted by: FFactory0x
How do i punch the 5th root into my ti-83

here: try this

Text

EDIT: you punch the fifth root by using the "^" key for power, and then raise it to the 1/5th power.

 

[FFactory0x]

The equation on my fomula sheet says [(PI)HPR]^1/5 - 1

 

[FFactory0x]

The answer is

Stock T: 4.76% (0.04757)

How the hell do i get that!

 

[chuckywang]

Originally posted by: FFactory0x
The equation on my fomula sheet says [(PI)HPR]^1/5 - 1

It sounds like you're taking an investment course. That formula is not the geometric mean, but it is based on it.

1) Add 1 to all your numbers
2) Take the geometric mean of those numbers from step 1.
3) Subtract 1.

You're done.

EDIT: from the OP, you added the numbers instead of multiplying them. PI is the symbol for repeated multiplication.

 

[FFactory0x]

YEp. Did that. Thanks. I was doing everything right except multiplying those numbers. I added them instead. And you have to add 1