To specialists in the theory of probability. I have a portfolio of 10 stocks. What is the probability that 2 of my 10 companies will go bankrupt next year? - page 3

 

Let's imagine a hypothetical situation: there is a hiring process at a major company for the position of data scientist with a higher than average salary and unrealistic bonuses.

What is the probability that a plumber without special education, but a self-taught person with skills in statistics and machine learning, and no knowledge of mathematics, will get an interview?

 
Maxim Dmitrievsky:

Let's imagine a hypothetical situation: there is a hiring process at a major company for the position of data scientist with a higher than average salary and unrealistic bonuses.

What is the probability that a plumber without special education, but a self-taught person with skills in statistics and machine learning, and no knowledge of mathematics, will get an interview?

At the big one, the chances are slim. But if you get a recommendation from a not insignificant specialist, the chances increase.
 
Andrei:
To the biggest one, the chances are small. But if you get a recommendation from a not insignificant specialist, the chances increase.

Yes, through the bed. Roughly understood )

 
Nikolai Semko:

I don't get it. It seems to be a clear problem without ambiguities.

All the more, the result is clearly confirmed by practice

The assumption of the model you use is only approximated (the number of balls of the same colour is not fixed, but can only vary within small limits).

The easiest way to see the error is to sum up the probabilities of all possible outcomes: exactly 0 bankruptcies, exactly 1 bankruptcy, ..... exactly 10 bankruptcies. It should be exactly 1.

I estimate that your formula gives 1.002, which is a pretty good approximation. But with a portfolio of 100 stocks it is almost 1.02, and with 1000 stocks it is almost 1.2, which is not good at all.

 
igrok333:
Last year, 50 out of 5,000 companies went bankrupt in the US market. So the probability of a company going bankrupt is 1/100.

I have a portfolio of 10 stocks.

What is the probability that 1 of my 10 companies will go bankrupt in a year? It's easy to calculate.
The probability of one company going bankrupt is 1/100. And we take 10 companies, so we increase the odds of the event occurring by a factor of 10.
So we get a probability: 1/100 * 10 = 1/10.

The probability of bankruptcies is not uniform so the linear formula is not applicable. Small loss-making companies go bankrupt faster.

 
Maxim Dmitrievsky:

Yes, through the bed. Roughly understood )

You'd better start your own company, then you'll get it for sure. )
 
Andrei:
You'd better start your own company, then you'll be hired for sure. )

I have my own, but in a completely different field. In this one, I don't even know where to start on my own, it's better to work somewhere to start with.

 
Maxim Dmitrievsky:

I have my own, but in a completely different field. In this one, I don't even know where to start on my own, it's better to work somewhere to start with.

You should get on with a startup, they take everyone who can do something, and then you can jump on to something bigger.
 
Maxim Dmitrievsky:

I have my own, but in a completely different field.

Which one, if it is not a secret? You can attach AI everywhere if you want to.

 
Andrei:

Which one, if it is not a secret? You can attach AI everywhere if you want to.

In the (non-mass) service sector, there isn't even a large customer base, so there won't be much of an output from AI.