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Forum: Probability

Probability course and homework discussion. Probability distributions. Probability theory, stochastic processes

  1. Arrow Sticky Thread Sticky: We only provide homework help to those who show effort

    Welcome to Talk Stats Forum. In order to keep homework help effective and efficient, we request all members to abide by these guidelines: 1)...

    Started by quark‎, 09-30-2005 09:44 AM
    • Replies: 0
    • Views: 13,332
    09-30-2005, 09:44 AM Go to last post
  1. A bet between a buddy and I regarding the lottery

    Hello all, My coworker is convinced that the Powerball lottery is rigged against those players purchasing more than one game (set of 6 randomly...

    Started by metamologist‎, Yesterday 07:48 PM
    • Replies: 6
    • Views: 135
    Today, 02:22 PM Go to last post
  2. stats homework

    A car manufacturer takes an average of 17.5 hours to construct a car. This includes time for stamping, welding, painting, assembly and inspections....

    Started by skitdemon‎, 09-01-2015 09:22 PM
    • Replies: 1
    • Views: 111
    Yesterday, 12:50 AM Go to last post
  3. Probability Density Function of the derivative of a stochastic process

    Dear all; What is the expression of the PDF of the derivative of a stochastic process? My problem is completely general and theoretical, so, let's...

    Started by Bahi‎, 08-31-2015 06:45 AM
    derivatives, pdf, stochastic processes
    • Replies: 0
    • Views: 124
    08-31-2015, 06:45 AM Go to last post
  4. help plzzzz

    A national grocer's magazine reports the typical shopper spends eight minutes in line waiting for checkout. A sample of 24 shoppers at the local...

    Started by saima1‎, 08-31-2015 12:55 AM
    • Replies: 0
    • Views: 80
    08-31-2015, 12:55 AM Go to last post
  5. Question Prior probability distribution for k [a;b]

    Hi folks. I've a question. Let k be a parameter which must be estimated. It lies within the interval , a and b being finite real numbers. ...

    Started by lotharson‎, 08-30-2015 04:29 PM
    • Replies: 1
    • Views: 96
    08-30-2015, 06:36 PM Go to last post
  6. Every one says I am wrong, how can I be wrong?

    P(A)/x=(1/52)/t1 P(A)/y=σ=0_1/t2 x=52 y=f(^x) t1=continuos time

    Started by the box‎, 08-29-2015 03:35 AM
    • Replies: 1
    • Views: 168
    08-29-2015, 10:42 AM Go to last post
  7. Talking Probability problem

    A Committee consist of 8 men and 5 women. 1)in how many ways the group consisting of 4 members can be seleceted 2)in how many group will contain...

    Started by Mahesh mk‎, 08-28-2015 03:18 AM
    • Replies: 0
    • Views: 115
    08-28-2015, 03:18 AM Go to last post
  8. Probability of many coin flips coming up heads 65% etc.

    Hello, I am wondering how to calculate what the probability would be of flipping a coin, say, 250 times and having it come up heads 65% of the time....

    Started by Logangus‎, 08-27-2015 01:23 AM
    • Replies: 3
    • Views: 199
    08-27-2015, 06:11 PM Go to last post
  9. Newbie here, would appreciate some help.

    Hey guys. First post here and it's a bit basic so sorry about that. I have created an analogy to the problem I have. Say I have 8 balls, 4 of...

    Started by Everybody's fool‎, 08-26-2015 02:05 PM
    • Replies: 5
    • Views: 228
    08-27-2015, 02:15 PM Go to last post
  10. Raw moments of 3-parameter Weibull distribution

    Hi, I know that the formula for computing the raw moments of 2-parameter Weibull distribution is: Mu'n=b^n*Gamma(1+n/c), where b and c are scale...

    Started by mehdi_m990‎, 08-25-2015 02:46 AM
    moments, weibull
    • Replies: 2
    • Views: 148
    08-26-2015, 12:37 AM Go to last post
  11. Help Settle and Argument re: Chance of Failure in Fantasy Football

    Hi, all! I'm new, so please accept my apologies in advance for... whatever. So here's the question. In a fantasy football league, there are...

    Started by nieltown‎, 08-25-2015 09:57 AM
    independent, probability, stupid
    • Replies: 11
    • Views: 225
    08-25-2015, 12:16 PM Go to last post
  12. Density probability of a normal distribution at a point in a CASIO calculator

    I do not understand the utility of calculating the density probability in a point in the case of a continuous variable (for example in the case of...

    Started by PCouper‎, 08-24-2015 12:51 PM
    • Replies: 4
    • Views: 151
    08-25-2015, 06:35 AM Go to last post
  13. Probability of goals in a football match?

    I am trying to work out the probability of teams scoring a goal in a football match. Obviously there are many factors to consider, and the...

    Started by mattadams84‎, 08-23-2015 10:44 AM
    football, goal, probability, statistical analysis
    • Replies: 6
    • Views: 240
    08-24-2015, 12:59 PM Go to last post
  14. Probability & Network Theory

    Hey Everyone, new to this forum and studying network/graph theory on my own. Math has never been my strong point, and I need help with how the...

    Started by jwu013‎, 08-20-2015 08:37 PM
    • Replies: 3
    • Views: 209
    08-22-2015, 07:06 PM Go to last post
  15. probability of observation

    In a hospital, births occur randomly at an average rate of 2 births per hour. Calculate the probability of observing 1. 3 births in a given...

    Started by Rana Riaz Ahmed Anjum‎, 08-14-2015 01:32 AM
    • Replies: 2
    • Views: 560
    08-20-2015, 09:38 AM Go to last post
  16. formula for False Alarm Rate and Power of Detection based on Median Run Length

    Hi, What is the formula for False Alarm Rate and Power of Detection based on Median Run Length?

    Started by Fam‎, 08-18-2015 03:53 AM
    mrl far detection power
    • Replies: 0
    • Views: 175
    08-18-2015, 03:53 AM Go to last post
  17. Contribution to a Probability

    Hi All, I'm sorry that this question is trivial but I'm afraid I've forgotten how to solve simple probability and statistics problem :( Say...

    Started by edp‎, 08-18-2015 12:46 AM
    • Replies: 0
    • Views: 108
    08-18-2015, 12:46 AM Go to last post
  18. Weibull/Normal Distribution Hazard Rate Calculation

    Hi, so I've been searching the web a while for a real example or procedure to get hazard rates from actual data but all I can come up with are...

    Started by howe0168‎, 08-13-2015 03:27 PM
    weibull distribution
    • Replies: 0
    • Views: 108
    08-13-2015, 03:27 PM Go to last post
  19. Pagano solution chap 6

    Does anyone have pagano solution book. I just want to know the answers of chap 6 excercise 9 and 15. a b, c d answers. Thanks.

    Started by Maryam2008‎, 08-13-2015 12:44 AM
    • Replies: 0
    • Views: 132
    08-13-2015, 12:44 AM Go to last post
  20. Help in solving a question

    Hello everyone, I am working on some exercise questions from probability. I am stuck at this question. Can somebody help me to solve this. I would...

    Started by Aleem‎, 08-01-2015 04:09 PM
    • Replies: 3
    • Views: 342
    08-13-2015, 12:33 AM Go to last post
  21. help with homework qouestion

    suppose that an admission test at a certain college is designed so that the probability of passing it is 60%. The probability that among 20...

    Started by TODZAA‎, 08-08-2015 08:56 AM
    • Replies: 2
    • Views: 274
    08-10-2015, 03:35 PM Go to last post
  22. Triangular distribution

    Hi all, I have a quick question and I hope you can address that. if I have two uniformly distributed variables x~ and y~ what would be the...

    Started by ashraf‎, 08-08-2015 01:08 AM
    • Replies: 1
    • Views: 146
    08-08-2015, 02:41 AM Go to last post
  23. Layperson with a question

    Hello! A friend of mine recently asked me for help with this, and while we kicked around a few ideas, we weren't really satisfied. That, and the fact...

    Started by Phi618‎, 07-20-2015 07:11 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 835
    08-06-2015, 09:10 PM Go to last post
  24. compromise between efficiency and accuracy

    Hi! Not sure I post in the right place, but maybe you can help, and some probabilities can be introduced in discussion for the following problem:...

    Started by sorin‎, 08-06-2015 10:36 AM
    random sample
    • Replies: 0
    • Views: 108
    08-06-2015, 10:36 AM Go to last post
  25. Noob question about "combined" probabilities.

    Hello! Sorry for my poor english, Im from Argentina. And sorry too if Im in the wrong place. I need some knowledged about stats and this forum...

    Started by Capanegra‎, 07-27-2015 08:26 AM
    compare proportions
    • Replies: 10
    • Views: 429
    08-04-2015, 09:16 AM Go to last post
  26. Questions on likelihood and MLE, help please!

    Hey guys, got few questions on likelihood and MLE stuff and hope to get some help and advises on them please. Question Pr(X=x|p) = ((1-p)^(x-1))...

    Started by jamessuh36‎, 08-04-2015 02:31 AM
    • Replies: 0
    • Views: 124
    08-04-2015, 02:31 AM Go to last post
  27. What is the probability people are forecasting correctly with standard spreadsheets?

    It seems that many people are using standard spreadsheets to forecast, getting correlation coefficients, etc. However I decided I needed to write my...

    Started by Swayseker‎, 08-03-2015 08:38 AM
    forecast error, probability
    • Replies: 0
    • Views: 109
    08-03-2015, 08:38 AM Go to last post
  28. Hypergeometric distribution appears to have hidden problems

    When I was writing a computer program to calculate hypergeometric distributions probabilities I had some funny results. This is because I just used...

    Started by Swayseker‎, 08-01-2015 12:57 PM
    conditions, hypergeometric, probability
    • Replies: 2
    • Views: 173
    08-03-2015, 08:15 AM Go to last post
  29. Calculate the moment generating function

    Hello, I can not calculate the generating function of X / Y = y . E (e ^ (-t X / Y = y)). (see attached file) Thanks so much.

    Started by Alex2015‎, 08-03-2015 08:10 AM
    • Replies: 0
    • Views: 82
    08-03-2015, 08:10 AM Go to last post
  30. Probability of an accident

    Looking for help with this problem: A train will pass the same point every 7.5 minutes everyday of the week from 4am to 8am. There are 3380...

    Started by JacQue DuBois‎, 07-28-2015 03:29 PM
    • Replies: 6
    • Views: 366
    08-01-2015, 12:24 PM Go to last post
  31. Expectation of truncated normal X conditional on truncated normal Y

    I am trying to derive: E(X|a \leq Y \leq b) where c \leq X \leq d , X and Y are (doubly truncated) Gaussians with the same mean and different...

    Started by CLP_PS‎, 07-27-2015 06:35 PM
    • Replies: 2
    • Views: 263
    07-28-2015, 10:37 AM Go to last post
  32. Help with Bayesian question please

    Just got a question with Bayes problem, I always struggle to understand the actual question in Bayes problems so that could be why I'm stuck, but...

    Started by jamessuh36‎, 07-22-2015 08:31 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 48
    • Views: 1,074
    07-27-2015, 09:48 AM Go to last post
  33. Need help with 2x2 table

    Hey guys, Struggling to put this question into a 2x2 table. Any help would be appreciated. A new drug has been developed to manage early...

    Started by Hark‎, 07-26-2015 08:29 PM
    • Replies: 1
    • Views: 179
    07-27-2015, 05:35 AM Go to last post
  34. Probability of 20 people drawing the same card 9 or more times in a deck of cards.

    Hello! This is my first post so apologies if I'm out of line :-S! I've looked EVERYWHERE and haven't found a problem that I an use as a model... I've...

    Started by imackenzie‎, 07-25-2015 12:35 PM
    • Replies: 2
    • Views: 221
    07-26-2015, 06:58 AM Go to last post
  35. Help is needed for a probability question

    Homework needs to be done during the weekends. Question is A box contains 2 red balls and 4 yellow balls. If a ball is randomly drawn from the...

    Started by lcaine96‎, 07-24-2015 11:51 AM
    • Replies: 2
    • Views: 159
    07-24-2015, 12:29 PM Go to last post
  36. Book for stochastic processes

    I need a good reference to learn these topics 1. Markov Chains in discrete time. 1.1. Classification of states, recurrence notions of...

    Started by askazy‎, 07-07-2015 05:58 PM
    • Replies: 4
    • Views: 330
    07-22-2015, 01:23 PM Go to last post
  37. Counting problem?

    NOW SOLVED. SPECIAL THANKS TO rogojel and con-tester. This is probably a simple problem, but I have been through my 8 counting rules about different...

    Started by Swayseker‎, 07-22-2015 07:41 AM
    • Replies: 3
    • Views: 168
    07-22-2015, 10:55 AM Go to last post
  38. Random numbers

    Hello, let me go direct to point: Let's say i have a total of 60 numbers (1-60) and i can generate 6 random numbers among them, in this case: 5,...

    Started by msw‎, 06-01-2015 01:28 AM
    • Replies: 12
    • Views: 613
    07-22-2015, 08:00 AM Go to last post
  39. Binomial question?

    I have this question that I think is binomial probability. Bananas that are almost ripe to pick carry the chance of being 15% rotten. What would be...

    Started by chrismyers1‎, 04-23-2015 09:42 AM
    • Replies: 4
    • Views: 449
    07-21-2015, 12:32 PM Go to last post
  40. Poisson and binomial distributions

    I composed this question: A hospital has 20 ambulances and on average 2 break down a day. There are five ambulances in reserve and if more then five...

    Started by Swayseker‎, 07-21-2015 10:33 AM
    binomial, poisson
    • Replies: 2
    • Views: 165
    07-21-2015, 10:57 AM Go to last post
  41. A little help with choosing tests?

    Hello, I am new here. A little background, I am a Masters of Forensic Science student with a little statistics knowledge. I am currently working...

    Started by blpierce76‎, 07-15-2015 09:39 AM
    • Replies: 9
    • Views: 715
    07-21-2015, 09:32 AM Go to last post
  42. Probabilistic models - clarification on separation of model and solver

    Almost all of the material I read on probabilistic models/ probabilistic programming mentions separating solver and the model, thus stating the...

    Started by optimist‎, 07-20-2015 08:38 AM
    probabilistic sampling, probability model
    • Replies: 0
    • Views: 149
    07-20-2015, 08:38 AM Go to last post
  43. Calculating a stochastic matrix with multiple states

    I am struggling with how to calculate the values of a Markov matrix which has multiple states. For example, Imagine an unfair 6 sided dice. The...

    Started by Codetemplar‎, 07-12-2015 07:42 AM
    • Replies: 1
    • Views: 313
    07-14-2015, 11:02 AM Go to last post
  44. variance of a function of random variables

    Hi all, I'm trying to calculate the variance of a function of two continuous random variables and could do with a nudge in the right direction...

    Started by james92‎, 07-11-2015 11:14 AM
    • Replies: 1
    • Views: 214
    07-11-2015, 11:58 AM Go to last post
  45. Trying to calculate confidence intervals

    Hi everyone. The numbers below are the annual maintenance costs of a program I am working on. I'd like to use the data set to estimate future costs...

    Started by costgeek‎, 07-08-2015 09:11 AM
    cdf, confidence, distribution, probability
    • Replies: 2
    • Views: 307
    07-08-2015, 10:02 AM Go to last post
  46. Probabiilities help

    The question I am trying to answer is: What is the probability of dealing three black cards from a standard deck when dealing them from a standard...

    Started by klee04268‎, 07-05-2015 01:00 PM
    • Replies: 4
    • Views: 340
    07-05-2015, 05:22 PM Go to last post
  47. Probability Ideas in the monty Hall problem Stats class assignment help!

    Watch a YouTube video that explains the problem: "Monty Hall Problem with Ron Clarke", this video starts with "Hello and welcome to the Monty Hall...

    Started by notastatswizard‎, 06-30-2015 02:36 AM
    • Replies: 2
    • Views: 410
    06-30-2015, 04:48 PM Go to last post
  48. Help Please...

    I have no idea how to solve this problem A survey of undergraduate calculus and physics students showed that 58% of them had donated blood at...

    Started by Solodolo7‎, 06-29-2015 05:32 PM
    • Replies: 0
    • Views: 293
    06-29-2015, 05:32 PM Go to last post
  49. how to find MGF ?

    E(X^r)=(r+1)!* (2^r). we have to find MGF of random variable X.

    Started by Avnish29‎, 06-29-2015 02:38 PM
    • Replies: 0
    • Views: 109
    06-29-2015, 02:38 PM Go to last post
  50. Please help!

    I am a 58 yr old Grandpa looking to see if there is Shananagan's are going on at my work. I want to find out the probability in this scenario. You...

    Started by geades‎, 06-29-2015 12:15 PM
    • Replies: 2
    • Views: 144
    06-29-2015, 01:19 PM Go to last post
  51. Expected value of absolute value without replacement

    I'm trying to figure something out for as a curiosity of mine, and I apparently can't remember enough of my college statistics class to solve it. If...

    Started by Akolas‎, 06-29-2015 10:54 AM
    • Replies: 1
    • Views: 118
    06-29-2015, 11:31 AM Go to last post
  52. Crying inside 😖 just can't quite get probability

    I'm taking stats online and this unit is on probability. I'm having a terrible time understanding it. The conditional probability rule is where I'm...

    Started by notastatswizard‎, 06-29-2015 03:03 AM
    • Replies: 0
    • Views: 286
    06-29-2015, 03:03 AM Go to last post
  53. Mapping a pdf to peaky pdf

    Hi All, From past few days I am trying to model this mapping function. I want to map a distribution(uniform/non-uniform) to a more peaky...

    Started by praj_7‎, 06-27-2015 12:44 PM
    • Replies: 0
    • Views: 208
    06-27-2015, 12:44 PM Go to last post
  54. Analysis of Squash Match

    I've been stuck on this problem for days. Any help, solutions or just pointers would be very welcome. A squash match is composed of a number of...

    Started by pvm‎, 06-25-2015 07:32 AM
    • Replies: 0
    • Views: 255
    06-25-2015, 07:32 AM Go to last post
  55. Lightbulb Higher standard deviation than the mean

    HI ! Excuse me for my english, my writing is not very good. I want to know what implies or what explains in an excercise when the standard deviation...

    Started by alvaroiv‎, 06-22-2015 06:55 PM
    • Replies: 3
    • Views: 368
    06-23-2015, 07:42 AM Go to last post
  56. Non parametric distribution

    Hello everyone, I have the following problem I could not solve (I published it before but it seem it did not get through. The authors is making a...

    Started by ndm905‎, 06-21-2015 07:39 PM
    • Replies: 0
    • Views: 56
    06-21-2015, 07:39 PM Go to last post
  57. Post WANT Theoretical Probabilities theory books suggestion

    Hello, I am reading a theoretical probability theory book " Probability Theory: The Logic of science " by E.T.Jaynes. But, this book is very advanced...

    Started by ansh23898‎, 06-20-2015 09:35 AM
    book, probability theory, theory
    • Replies: 1
    • Views: 301
    06-21-2015, 01:50 AM Go to last post
  58. Probability of completing multiples of objects

    Hey Guys! I'm struggling with a posed question about completing a set of objects and would really appreciate some direction. EX: There are 10...

    Started by Sigbog‎, 06-16-2015 07:45 PM
    • Replies: 3
    • Views: 334
    06-18-2015, 01:52 PM Go to last post
  59. Book recommendations for distributions?

    Hi everyone, I'm relatively new to stats (have done two beginner courses on it), and I feel like I learn best when I have an engaging book by my...

    Started by curious_notes‎, 06-17-2015 05:13 PM
    • Replies: 2
    • Views: 228
    06-17-2015, 10:15 PM Go to last post
  60. Monty Hall with Bayes Theorem

    hi, I just ran across a strange statement in the solution of the MH problem with Bayes as it is described here for instance...

    Started by rogojel‎, 06-17-2015 12:05 AM
    • Replies: 0
    • Views: 185
    06-17-2015, 12:05 AM Go to last post

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