# Average of function

1. Feb 1, 2008

### shushu97

Hello

Is it correct to say that average of ln(x) can be approximated by ln(average of x) where x is composed of mean and deviational parts?

Thanks for your help!

2. Feb 1, 2008

### EnumaElish

In general, no. That's because $\log\left(\sum_i x_i\right)\ne\sum_i\log\left(x_i\right).$

Last edited: Feb 1, 2008
3. Feb 1, 2008

Thanks!