Knowing the quantity of BTCs mined each day and the trading volumes on MTGox, is it possible to understand what is the percentage of BTCs mined and immediately sold by miners currently?
I don't think there is a way to figure that out.
There has to be some connection.
For instance if the current quantity of BTCs we can mine is 36000 a day and the trading volume is 175000 a day does it mean either that the mined BTCs change 4 times a day the owner, if sold completely, or, if not, more than 4 times a day?
Probably someone who is very good in statistics we'll have no difficulty to calculate it.
We have others parameters as well: the current price of BTCs and how much fiat the miner would need to cash out to cover his costs.
