Recent content by KFC

  1. K

    I About the expectation value

    Hi there, Thanks for the reply. Your comment give me some hints on how to view the problem in different aspect. But I found that there is an issue in the number I gave since it will cause the expectation value (without redraw) to over 1, which means the player have advantage to win in long...
  2. K

    I About the expectation value

    Hi all, I am creating a game for fun, which need some math skill to work out the chance of winning and the way to keep the banker never lose. The configuration of the game is like this: five boxes marked no.1, no.2, no.3, no.4 and no.5; there are many balls in different color in each box. For...
  3. K

    I About binomial statistics

    Hi all, I am solving a practical math problem. There is a sale in one of the shopping mall in my town. The mall gives 10 coupons to a new customer. The customer could use one coupon at a time and when it is used, one could spin a fortune wheel to win more 10 more coupons. If one doesn't win...
  4. K

    I Finding the average time with given probability

    Hi all, I am thinking a problem of drawing a ball in a sealed box. Assuming there is a box, contains plenty red and white balls, the number of red and white balls are unknown but let's assume there will be ##p## chance to draw a red ball and ##q=1-p## chance to get a white one. Those...
  5. K

    I Statistical problem of drawing colored balls from boxes

    ##E_n## is obtained from ##D## in the way ## E_n = \frac{n}{1- D\sum q_i} ## Well, I just find that there is a bug in my program, I corrected it and my simulation shows the same result (3.034) now. So I think the above calculation should be correct. Here is what I did in my code Setup a...
  6. K

    I Statistical problem of drawing colored balls from boxes

    Sorry, I didn't complete the math. I typed all but after I preview that some part were gone, don't know why. Anyway, let me rephrase it here. One thing is very important I missed in the question, in second box game, place the drawn ball back to the box, so the probability of drawing...
  7. K

    I Statistical problem of drawing colored balls from boxes

    Last week I went to a state fair which I saw a game of lucky draw. There is two sealed boxes, contains bunch of 4 different color balls: red, blue, green and white. Here is the game rule. Players make an initial draw on box one, if players get a white ball, lose the game; if getting a red one...
  8. K

    I About control random variables

    Hi all, I am developing a very simple computer game to randomly move a point to on a bound region and check how many steps it takes to have the point landing to a certain place. To make it simple, I assume it is a 1D problem, the point could start on origin or any location on positive x axis...
  9. K

    I About standard deviation

    Thank you so much for your explanation. I think I get some points from here. So from the first comment you made, when you say population mean and population SD, do you mean the real mean and SD that computed from every single entities in the sampling space. But in actual case, it is not possible...
  10. K

    I About standard deviation

    Hi all, I learn some statistics some times ago. It has been while but I still remember some characteristics and property of the normal distribution. One of them is the standard deviation could be used to estimated the probability of finding the entity around the mean in the range ##[-n\sigma...
  11. K

    I How to understand diffusive and ballistic transport?

    Thanks for reference. It looks like a very good article to read. When I first think of the problem, I am thinking of the transport in gas.
  12. K

    I How to understand diffusive and ballistic transport?

    Hi there, I am always confusing in the difference between diffusive and ballistic transport. My understanding on the diffusive transport is from it's name, particles diffuse from the high density region into the low density region. I think the diffusion happens towards all direction, is it why...
  13. K

    B About creating a product state

    Thanks for the reply. I didn't confuse those two things. I though I clarify that at the beginning by saying that they are two questions but obviously I didn't make it clear enough. Anyway, my last question is about how to measure ##\langle a|b\rangle## (nothing to do with the product state...
  14. K

    B About creating a product state

    Thanks. I think I understand that now. But I am still looking for the answer for the second question. Let say I have two states ##|a\rangle## and ##|b\rangle##, what is the significance of this ##\langle a | b \rangle##, by reading some examples found in the text, can I say that it stands for...
  15. K

    B About creating a product state

    Thanks for that information. I understand that in math. But how actually people do that in experiment?
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