سوال فوق رو یک فرد محقق در زمینه مطالعات اقتصادی تو یکی از گروه های yahoo که مرتبط با علم آمار پرسیده بود.
جواب های مختلفی به این سوال داده شده بود، من یکی از اون ها رو انتخاب کردم و براتون این جا گذاشتم. امیدوارم مفید فایده باشه.
Your question is quite philosophical. Do the random variables really exist?. or in another way. is the randomness inherent to the real world?
The answer for that question is embodied in another discution.
At the begin of the XX century the discution was protagonized by A Einstein and Heisenberg about of uncertainty principle. Einstein once said: "God does not play dice".
Albert Einstein believed that randomness is a reflection of our ignorance of some fundamental property of reality, while Niels Bohr believed that the probability distributions are fundamental and irreducible, and depend on which measurements we choose to perform. Einstein and Bohr debated the uncertainty principle for many years.
The determinism scientist at that time believed that always could be posible to find a relation between variables on wich everything could be explain completely.
Another clear example of the randomness are the laws inheritance. If the result of genetic combinations do the same result then you and your brothers and sisters could have been identic.
If you believe that randomness is valid only in the nature or biological events. In the industry it was proved that even the machines have little variations in its production.
Some times the randomness is introduced by the choose mechanism. As in Surveys Sample.
Example: We want to know the mean diameter in a population of 10,000 trees. Then we decide to get a sample because is expensive to take measures to each tree. Take in count that the real measure in a especific time is constant in each tree. But the result is random, because it depends on the sample.
BOGARTH HDZ CRISANTY
Licenciatura en Estadística
Universidad Autónoma Chapingo