How to Determine Sample Size for Central Limit Theorem?

[moonman239]

Is there a way to calculate/estimate how big a sample from a parent distribution would need to be for the distribution of the mean of that sample to be approximately normally distributed?

 

[MaxManus]

You can't just calculate it, it depends on the distribution of the data. But about 30 is the rule of thumb.

 

[bpet]

The Berry-Esseen theorem may be useful here.