Geometric Mean

[bs42]

So I figured that this problem dealt with geometric mean, but I'm not sure how to solve it.
Quarter:
1 10% growth
2 5% growth
3 12% growth
4 8% decrease

Find the average percentage of growth.
ANS: 4.45%

[BlasianAsian]

I'm useless, but I'd like to know that too. Where's nsguy when you need him? Let's bait him here with a cookie. Anyone got one?

[nsguy1350]

Add the percent change to 100%, to get the following values:
1.1, 1.05. 1.12, .92.
If you take the geometric mean of these, you get 104.45%, meaning 4.45% average percent growth.
And see, you single me out of everyone on the forum. Maybe I should stop answering questions ;)

[BlasianAsian]

Oh. You use the geometric mean. I thought you were supposed to average them. *facepalm*

Do you want me to stop?

[nsguy1350]

Relax, you're putting yourself down too much. At this rate, by senior year, you'll be excellent! You should be really good by next year, as well, and junior year.

[BlasianAsian]

Oh well. Just gotta work over the summer.