Average of ln(x): Approximating with ln(average of x)

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SUMMARY

The discussion centers on the mathematical relationship between the average of the natural logarithm of a set of values, ln(x), and the natural logarithm of the average of those values, ln(average of x). It is established that the average of ln(x) cannot be accurately approximated by ln(average of x) due to the inequality \log\left(\sum_i x_i\right) \neq \sum_i\log\left(x_i\right). This distinction is crucial for accurate mathematical modeling and analysis.

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shushu97
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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!
 
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In general, no. That's because [itex]\log\left(\sum_i x_i\right)\ne\sum_i\log\left(x_i\right).[/itex]
 
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Thanks!
 

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