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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: 31,080
    09-30-2005, 09:44 AM Go to last post
  1. 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: 6,841
    07-27-2015, 09:48 AM Go to last post
  2. 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: 1,383
    07-27-2015, 05:35 AM Go to last post
  3. 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: 1,833
    07-26-2015, 06:58 AM Go to last post
  4. 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: 1,145
    07-24-2015, 12:29 PM Go to last post
  5. 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: 1,660
    07-22-2015, 01:23 PM Go to last post
  6. 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: 1,664
    07-22-2015, 10:55 AM Go to last post
  7. 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: 2,576
    07-22-2015, 08:00 AM Go to last post
  8. 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: 1,699
    07-21-2015, 12:32 PM Go to last post
  9. 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: 1,209
    07-21-2015, 10:57 AM Go to last post
  10. 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: 2,051
    07-21-2015, 09:32 AM Go to last post
  11. 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: 1,017
    07-20-2015, 08:38 AM Go to last post
  12. 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: 1,255
    07-14-2015, 11:02 AM Go to last post
  13. 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: 1,762
    07-11-2015, 11:58 AM Go to last post
  14. 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: 2,205
    07-08-2015, 10:02 AM Go to last post
  15. 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: 2,324
    07-05-2015, 05:22 PM Go to last post
  16. 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: 2,912
    06-30-2015, 04:48 PM Go to last post
  17. 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: 3,269
    06-29-2015, 05:32 PM Go to last post
  18. 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
    mgf
    • Replies: 0
    • Views: 1,962
    06-29-2015, 02:38 PM Go to last post
  19. 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: 1,466
    06-29-2015, 01:19 PM Go to last post
  20. 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: 2,455
    06-29-2015, 11:31 AM Go to last post
  21. 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: 20,382
    06-29-2015, 03:03 AM Go to last post
  22. 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: 1,137
    06-27-2015, 12:44 PM Go to last post
  23. 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: 1,848
    06-25-2015, 07:32 AM Go to last post
  24. 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: 1,924
    06-23-2015, 07:42 AM Go to last post
  25. 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: 968
    06-21-2015, 07:39 PM Go to last post
  26. 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: 1,397
    06-21-2015, 01:50 AM Go to last post
  27. 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: 1,508
    06-18-2015, 01:52 PM Go to last post
  28. 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: 1,444
    06-17-2015, 10:15 PM Go to last post
  29. 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: 1,412
    06-17-2015, 12:05 AM Go to last post
  30. Calculating observed probability

    Can anyone point me towards the formula and extra reading I would need to calculate how many observations I would need to make in order to calculate...

    Started by ThomasCNot‎, 06-10-2015 08:41 AM
    confidence interval, observed probability
    • Replies: 3
    • Views: 3,072
    06-12-2015, 06:15 AM Go to last post
  31. hi every body

    hi everybody I'm new here I'm doing a research I have a questionnaire with 3 scales positive neutral negative which i want to do statics using...

    Started by hragaey‎, 06-10-2015 06:45 PM
    • Replies: 2
    • Views: 1,947
    06-11-2015, 09:21 AM Go to last post
  32. Getting standard deviation given probability

    Hi all If you have a mean of 2 and you want to get standard deviation with probability of 90% that the new mean will lie between 1.5 and 2.5. I...

    Started by Ahmed Arnous‎, 06-10-2015 01:08 PM
    • Replies: 4
    • Views: 1,659
    06-10-2015, 03:31 PM Go to last post
  33. CHI^2 test for binomial variables which are not normally distributed

    Hello, Assume that you have X_1\cdot X_n independant random variables. If they are normally distributed we can use the Chi^2 statistical test to...

    Started by CBW‎, 06-10-2015 07:59 AM
    • Replies: 0
    • Views: 953
    06-10-2015, 07:59 AM Go to last post
  34. Conditional density, bivariate normal

    Let Z=X+Y where X \sim N(\mu,\sigma^2) and Y \sim N(0,1) are independent. What is the conditional density of X given Z, f_{X|Z}(x|z)? I already...

    Started by askazy‎, 06-09-2015 09:26 PM
    bivariate normal, conditional density
    • Replies: 3
    • Views: 1,453
    06-10-2015, 05:51 AM Go to last post
  35. Probability Applications - Drawing from a Deck of Cards

    Hi! I am having trouble figuring out how to go about solving the following problem: "Find the probability of obtaining the given 5-card poker...

    Started by punky3295‎, 06-06-2015 12:04 PM
    cards problem, probability, statistics
    • Replies: 1
    • Views: 1,370
    06-06-2015, 12:35 PM Go to last post
  36. What is the probability of not drawing a club from a deck of cards

    Hi, Can someone help me with this please? You draw 40 playing cards, 1 at a time, with replacement from a standard deck. What is the probability...

    Started by pawilliams‎, 06-05-2015 03:53 AM
    • Replies: 2
    • Views: 2,367
    06-05-2015, 07:43 AM Go to last post
  37. Probability of solder ball inside a sealed package able to cause a failure

    I have a hermetically sealed semiconductor package, NAND. And I have some foreign object debris (FOD), solder balls to be exact, inside this device....

    Started by ChootarLaal‎, 06-04-2015 09:21 AM
    • Replies: 0
    • Views: 899
    06-04-2015, 09:21 AM Go to last post
  38. Probability of default

    What is the probability of default in 2 years? The probabilit of default year 1= 10% The probability of default year 2 = 10%

    Started by kronofogdn‎, 06-04-2015 02:03 AM
    • Replies: 0
    • Views: 878
    06-04-2015, 02:03 AM Go to last post
  39. My program TARGETS

    I used a Monte Carlo method of finding probabilities of collisions between a randomly tossed circular block and non-overlapping randomly placed...

    Started by ArtK‎, 06-03-2015 02:42 PM
    • Replies: 0
    • Views: 868
    06-03-2015, 02:42 PM Go to last post
  40. Probability

    This is not part of any homework, but an odd occurrence that happened within our family and I'd just like to find out what the chances/odds of this...

    Started by NOTamathguy‎, 05-29-2015 07:22 AM
    • Replies: 4
    • Views: 1,819
    05-29-2015, 09:54 PM Go to last post
  41. Generate simulation data with PDF and ACF

    Dear I'am trying to model a wireless channel based on throughput measurements. I've processed the measurements and approximated the PDF of the...

    Started by Pieter Cardoen‎, 05-27-2015 03:53 AM
    • Replies: 4
    • Views: 1,606
    05-27-2015, 09:30 AM Go to last post
  42. Probability to win

    Hello, I would like to calculate the probability to win 3 times in a lottery considering the following: 1 - the chance to win 1 time is 1 in...

    Started by Marcus5800‎, 05-24-2015 07:21 PM
    lottery
    • Replies: 11
    • Views: 1,665
    05-25-2015, 01:54 PM Go to last post
  43. probability of 8 successes out of 256 events

    Hi all hope you are well, i was trying to calculate what the probability of getting exactly 8 successes in 256 events. I used a Binomial on line...

    Started by censura‎, 05-21-2015 02:44 AM
    • Replies: 5
    • Views: 1,592
    05-25-2015, 06:12 AM Go to last post
  44. probability of choosing number

    I have a question related to probability of choosing numbers. If there is 5 people picking numbers from 1 to 5, there is 5^5 ways to pick...

    Started by ikemen‎, 05-24-2015 01:03 AM
    • Replies: 1
    • Views: 1,019
    05-25-2015, 05:47 AM Go to last post
  45. Question Bayes's Theorem

    Hi! Say there is a deck of 100 cards: Red w/ numbers = 40 Red w/ figures=15 Black w/ numbers=35 Black w/ figures=10 The only information...

    Started by DrAnthonyRodriguez‎, 05-22-2015 07:42 AM
    bayes' theorem
    • Replies: 4
    • Views: 1,656
    05-23-2015, 03:22 AM Go to last post
  46. Probability definition

    Hi stats guys, I had a heated discussion about the following situation today: Letís say I have a function f(x) producing values between 0 and...

    Started by Stats_Newbie‎, 05-22-2015 09:48 AM
    • Replies: 6
    • Views: 1,300
    05-22-2015, 10:40 AM Go to last post
  47. A little help

    I know that a event with two outcomes such as making a three throw in basketball doesn't necessarily have a probability of 0.50, it could range...

    Started by misterx‎, 05-16-2015 08:41 AM
    • Replies: 1
    • Views: 1,244
    05-18-2015, 07:42 AM Go to last post
  48. differential distribution frequency

    Hi there. pls I'm studying the production of energy from sawdust.So I need a firm grip in powder technology.Can anyone pls show me mathematically how...

    Started by PSDman‎, 05-14-2015 03:26 PM
    • Replies: 0
    • Views: 1,300
    05-14-2015, 03:26 PM Go to last post
  49. Bayesian Convergence

    I have to go to bed any minute, so I apologize for the lack of detail provided. I was thinking about repeated testing and how probabilities...

    Started by hlsmith‎, 05-10-2015 10:04 PM
    • Replies: 7
    • Views: 1,914
    05-13-2015, 03:26 AM Go to last post
  50. Combination of families of fragility curves (cumulative probability functions)

    Hi guys, I am a geotechnical engineer and currently involved in a project for risk calculation of an embankment dam. It's my first post here, I am...

    Started by sandreev‎, 05-11-2015 09:42 AM
    conditional probability, engineering, fragilities, uni-modal limits theorem
    • Replies: 0
    • Views: 1,704
    05-11-2015, 09:42 AM Go to last post
  51. Wink Probability on Roulette. Just curious!

    Hello all. Could you help me? I have been discussing the following topic with my work teammates; We were talking about statistics and...

    Started by thenewone‎, 05-08-2015 07:30 PM
    bayers theorem, chaos, random, roulette
    • Replies: 2
    • Views: 1,195
    05-11-2015, 09:26 AM Go to last post
  52. Probability of relations in a network

    Imagine i have a predicate $friends(p_1, p_2)$ and I know that $p(friends(p_1, p_2)) = p_1$. If I generate a world of $n$ people, I expect there to...

    Started by d.hammer‎, 05-08-2015 07:29 AM
    graph, probability
    • Replies: 0
    • Views: 999
    05-08-2015, 07:29 AM Go to last post
  53. Google Earth circles probability

    Hi everyone. Not sure if this is the right forum but I'll give it a go. Q: If you draw a circle on a sphere, what are the odds that a randomly...

    Started by BedrockGeometry‎, 05-07-2015 05:27 AM
    • Replies: 3
    • Views: 1,254
    05-07-2015, 08:58 AM Go to last post
  54. dice rolling odds. please help!

    Suppose you have a FIVE sided dice. One of the sides has a star on it, the other four sides are blank. Suppose you rolled it 10 times. What are the...

    Started by ospreyx‎, 05-06-2015 06:59 PM
    dice, odds, probability, statistics
    • Replies: 1
    • Views: 1,346
    05-06-2015, 08:38 PM Go to last post
  55. Data probability/density

    Hi, hope im in the right place. Im trying to find the best way to characterize the different data on this space? to 3 draw regions (or lines with...

    Started by barakah‎, 05-01-2015 09:47 AM
    • Replies: 4
    • Views: 1,464
    05-01-2015, 03:45 PM Go to last post
  56. Simple concrete example of Wold theorem?

    I'm reading the Wold decomposition theorem for time series in http://faculty.chicagobooth.edu/john.cochrane/research/papers/time_series_book.pdf. ...

    Started by JustAengineer‎, 04-29-2015 10:25 PM
    time series, wold theorem
    • Replies: 0
    • Views: 1,077
    04-29-2015, 10:25 PM Go to last post
  57. Probabilities and Monte-Carlo simulations - How to rank?

    I'm not that statistically clued up within this particular area but it's an issue I am facing for work (bizarrely) and am having trouble of working...

    Started by winters‎, 04-27-2015 02:35 PM
    • Replies: 8
    • Views: 2,733
    04-28-2015, 10:45 AM Go to last post
  58. Poll Poll: A probability problem

    Hi all, I would like to solve the problem bellow. To some it might seem to eassy. However i would appreciate some hints. Thanks in advance ... ...

    Started by marius15‎, 04-26-2015 08:49 AM
    • Replies: 7
    • Views: 2,913
    04-26-2015, 04:51 PM Go to last post
  59. Compound Probability

    Hey guys, i am having a bit of trouble with this basic probability question which shows that i do not understand the basics at all. The question...

    Started by daandrew‎, 04-18-2015 11:39 AM
    baseball, compound probability, probability
    • Replies: 4
    • Views: 1,514
    04-26-2015, 10:01 AM Go to last post
  60. Exercises with answers

    Hello probabilitygeniuses I am very new to probabilities and would like to ask if there are online resources with loads of probability...

    Started by molly‎, 04-15-2015 09:29 AM
    • Replies: 5
    • Views: 2,497
    04-26-2015, 09:29 AM Go to last post

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