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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: 30,371
    09-30-2005, 09:44 AM Go to last post
  1. conditional probability

    hi, well i've just started to mess around the probabilities and the problem i don't understand is : if a probability for a person to finish his...

    Started by cro77‎, 03-03-2010 02:21 PM
    • Replies: 2
    • Views: 2,256
    03-19-2010, 02:40 AM Go to last post
  2. Probability and forward error correction by parallel transmission

    I need a formula to express the probability of being able to correct single digit errors in a transmitted string of digits by transmitting the string...

    Started by crofter‎, 06-28-2014 08:27 AM
    • Replies: 0
    • Views: 1,271
    06-28-2014, 08:27 AM Go to last post
  3. Cumulative probability formula - majority of trials

    I posted a question below (28 June) on forward error correction which got no replies because it was too naive. I've found the answer I think which is...

    Started by crofter‎, 07-29-2014 06:51 AM
    • Replies: 0
    • Views: 1,521
    07-29-2014, 06:51 AM Go to last post
  4. Poisson. Calculate expected frequency problem.

    I've decided to brush up on my statistics recently by jumping right in the middle of it, and I landed on the normal distribution. I have this...

    Started by Cronos‎, 06-12-2009 07:06 AM
    • Replies: 4
    • Views: 10,373
    06-15-2009, 09:07 AM Go to last post
  5. Pollutants in auto exhausts.

    Hello all - I am in need of some assistance with a probability problem. I am thoroughly confused and I don't know what to do. Any help is...

    Started by crosby87‎, 10-24-2009 03:01 PM
    • Replies: 2
    • Views: 16,552
    10-25-2009, 11:26 AM Go to last post
  6. Electrical Engineering Random Process

    The question is below. A Random Process is given by X(t) = St + A. for t>=0 and X(t) = 0 for t<0. S is a zero-mean Gaussian RV with standard...

    Started by Crusader256‎, 04-08-2014 04:17 PM
    • Replies: 4
    • Views: 1,552
    04-08-2014, 08:46 PM Go to last post
  7. Joint Density f(X,Y) integration when there is no Y in the eqn

    Hi I'm having difficulties with integration by parts when the main function of a joint distribution doesn't contain the Y. Here it is: Let X and Y...

    Started by crusoe‎, 02-12-2011 06:35 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 8,670
    02-14-2011, 04:09 AM Go to last post
  8. Movement in Consumer Choice / Markov Chain??

    I'm trying to determine a way to model the choice behavior of a group of individuals whose choices are based on a 5-point scale (i.e. they can select...

    Started by Crystal‎, 08-06-2008 03:39 PM
    • Replies: 1
    • Views: 2,374
    08-06-2008, 04:03 PM Go to last post
  9. probability density function questions...

    Suppose X selects an integer, x, uniformly from the set S = {0,1,...,9}. Then Y selects an integer uniformly from {0,1,...,x^2}. Find: (a) f(x,y) ...

    Started by csc2iffy‎, 03-07-2012 11:33 PM
    • Replies: 1
    • Views: 2,186
    03-08-2012, 12:14 AM Go to last post
  10. continuous joint p.d.f.

    Hi guys :yup: I am struggling with this probability problem, and I would really appreciate some help! If someone could check over what I have so far...

    Started by csc2iffy‎, 03-08-2012 04:08 AM
    • Replies: 3
    • Views: 2,646
    03-08-2012, 11:53 AM Go to last post
  11. lock combinations Q- for fun, not work

    Suppose I want to crack a safe. What I know: The lock has numbers ranging from 0-75 The numbers can be repeated What I don't know: Whether...

    Started by csc2iffy‎, 03-09-2012 05:34 PM
    • Replies: 0
    • Views: 1,605
    03-09-2012, 05:34 PM Go to last post
  12. 3 Norm Dists (correlated), prob co-occurence of 1% right tail

    Hi, hoping someone can lead me in the right direction.. I'm looking at three normal distributions, specifically looking at the 1% extreme in each...

    Started by CStats‎, 10-20-2009 10:33 PM
    • Replies: 2
    • Views: 2,308
    10-21-2009, 05:15 PM Go to last post
  13. Need some help thinking ...

    As funny as that sounds, it's actually been a while since my stat classes. This actually isn't a homework question, I'm just trying to analyse some...

    Started by csteph9‎, 05-06-2011 01:53 PM
    • Replies: 0
    • Views: 1,377
    05-06-2011, 01:53 PM Go to last post
  14. Need help on stat, I will compensate

    hey guys, I need some tutoring before my stat final next week, the topics include: Inventory models (service levels, quantity discounts,...

    Started by CSUkkidd‎, 05-09-2009 01:23 AM
    • Replies: 0
    • Views: 2,554
    05-09-2009, 01:23 AM Go to last post
  15. A problem about expected value

    given two variables satisfying uniformly distribution as p1~U(0,a1),p2~U(0,a2), there is a random variable defined as s=(a1*p2-a2*p1)/(p1+p2). ...

    Started by csulazybug‎, 11-24-2006 08:00 AM
    • Replies: 0
    • Views: 1,918
    11-24-2006, 08:00 AM Go to last post
  16. Probability help

    Hey guys I'm new to this site, and I could really use some help! I am currently in a stats class and I'm so terrible with numbers it's not even...

    Started by cthurman‎, 01-15-2014 07:27 PM
    • Replies: 2
    • Views: 1,789
    01-16-2014, 09:35 AM Go to last post
  17. Predicting probability with standard deviations, mean high and low values.

    I registered on this forum specifically to ask this question. This is not homework, it's simply a for fun/hobby problem I am trying to solve. This...

    Started by Cuda1337‎, 08-22-2012 04:59 PM
    • Replies: 5
    • Views: 5,253
    06-14-2013, 03:55 AM Go to last post
  18. 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: 1,346
    06-17-2015, 10:15 PM Go to last post
  19. probability

    ok so the question says; find the probability that exactly two heads appearing in two tosses of a fair coin............... is the answer a half???...

    Started by cushane‎, 02-24-2012 10:48 PM
    • Replies: 1
    • Views: 2,270
    02-24-2012, 11:26 PM Go to last post
  20. Probability (compound event)

    Question: the event A&B are such that P(A)= x+.2 P(B)= 2x + .1 P(AnB)=x a) Given that P(AuB)= .7 find the value of x OK I DON'T EXPECT ANYONE...

    Started by cushane‎, 02-27-2012 06:07 PM
    • Replies: 12
    • Views: 2,706
    02-27-2012, 07:56 PM Go to last post
  21. binomial probability

    ok so here is the question i attempted but no getting the answer a loan officer has indicated that 80% of all loan application forms have zero...

    Started by cushane‎, 03-19-2012 06:48 PM
    • Replies: 0
    • Views: 2,439
    03-19-2012, 06:48 PM Go to last post
  22. System Response Time Alerts - Choosing a Statistical Method

    Hi It's been a long time since I had to use statistics in anger, so please bear with me. I have a test running that measures the response time of...

    Started by Custom24‎, 01-18-2016 02:05 PM
    • Replies: 1
    • Views: 1,374
    01-18-2016, 03:05 PM Go to last post
  23. distribution

    Distribute six energy units to four different states, 0ε, 1ε, 2ε, 3ε, with the constraint that the total energy of the system is equal to 4ε which...

    Started by cw2020‎, 04-19-2012 03:19 PM
    distribution, energy, normal distribution, probability
    • Replies: 0
    • Views: 1,395
    04-19-2012, 03:19 PM Go to last post
  24. Probability HW

    Hi, I need some help figuring out the inclusion probability. Here is the problem: Unequal probability sampling is often unavoidable, so it is...

    Started by cwalte03‎, 10-13-2010 07:42 PM
    • Replies: 0
    • Views: 2,460
    10-13-2010, 07:42 PM Go to last post
  25. Binomial probability question

    Hi all, I have been stumped on this binomial probability question and was wondering if anyone can help me get started: I was thinking...

    Started by cyanogen1024‎, 12-01-2013 10:50 PM
    • Replies: 2
    • Views: 1,901
    12-04-2013, 02:48 PM Go to last post
  26. How to obtain variance estimator

    Suppose we have the following ml estimator for beta beta = (lambda - c(1-lambda)) / p beta and lambda are proportions, c is a constant...

    Started by cylan‎, 06-17-2008 03:55 AM
    • Replies: 0
    • Views: 2,212
    06-17-2008, 03:55 AM Go to last post
  27. Probabilities from Distribution Functions

    Buses arrive at fifteen minute intervals starting at noon. Anne arrives at the bus stop X minutes after noon, where X is a random variable with...

    Started by cymol‎, 09-22-2013 05:04 PM
    cumulative, distribution probability, probability function
    • Replies: 1
    • Views: 2,406
    09-22-2013, 05:06 PM Go to last post
  28. Probability of irregular 10-sided die

    I've got an odd question here: I've got a 10-sided die with sides labeled as such: -1, 0, 0, 0, 0, 1, 1, 1, 1, 2 Thus, the odds for a single die...

    Started by cypher_zero‎, 08-05-2013 11:01 AM
    10-sided, d10, dice, irregular dice, probability distribution
    • Replies: 1
    • Views: 1,898
    08-05-2013, 11:05 AM Go to last post
  29. multivariate mutual information

    Hello everyone :wave:, I wonder if the equation concernat multivariate mutual information MI (X, Y, Z) = MI (X, Y) - MI (X, Y | Z) is the same...

    Started by cyrine‎, 07-30-2010 04:51 AM
    • Replies: 1
    • Views: 2,620
    08-25-2011, 07:01 AM Go to last post
  30. Problem with calculate joint probability

    Hello I have a problem with calculating joint probabilities in text mining. i have two paralel text like this for example Bonjour les bons amis ...

    Started by cyrine‎, 04-02-2013 11:49 AM
    joint probability
    • Replies: 0
    • Views: 1,296
    04-02-2013, 11:49 AM Go to last post
  31. To use binomial or not to use binomial?

    "For fans who visit the celebrity facebook page, 15% will click the ad on the page. Each click on the ad link will generate a $0.05 income. For a...

    Started by cys920622‎, 02-29-2012 04:21 AM
    • Replies: 3
    • Views: 1,553
    02-29-2012, 05:49 AM Go to last post
  32. Card Problem--(More than meets the eye...hopefully)

    Hmm, wondering if anyone can solve this problem, and possibly know which game show it came from: Say that you have 3 cards you can choose from:...

    Started by cytoplasmic‎, 12-14-2007 03:27 AM
    • Replies: 2
    • Views: 3,263
    12-14-2007, 07:45 PM Go to last post
  33. 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: 948
    05-08-2015, 07:29 AM Go to last post
  34. 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: 1,434
    04-26-2015, 10:01 AM Go to last post
  35. Probability of selecting two different colored balls

    Given an urn with x red balls, and y green balls, thoroughly mixed, what is the probability of choosing two colors in the first two picks, when the...

    Started by Daddii‎, 02-23-2014 01:45 PM
    probability, replacement, selection
    • Replies: 12
    • Views: 2,920
    02-25-2014, 10:20 PM Go to last post
  36. Permutation problem?!

    Hi all, I've been working on two problems that are really stumping me, and would really appreciate some help. Here is the problem, A computer...

    Started by dadingbanban‎, 07-09-2012 11:34 AM
    • Replies: 3
    • Views: 1,305
    07-09-2012, 04:41 PM Go to last post
  37. Membership in group

    This is from the Bertsekas Intro Probability book, 1st ed. How do you approach this problem? A class has 4 grad students and 12 undergrad...

    Started by DAE‎, 12-15-2010 03:57 PM
    • Replies: 4
    • Views: 2,654
    12-15-2010, 06:39 PM Go to last post
  38. Comparison of variability of synthetic and real data

    Hello, I'm trying to compare a real dataset with a random (synthetic) distribution to determine whether a pattern I see in the data is real or the...

    Started by Dafrst‎, 02-05-2014 03:36 PM
    bootstrap, random sampling, variability
    • Replies: 0
    • Views: 1,267
    02-05-2014, 03:36 PM Go to last post
  39. "Hepatitis" and "Golf" probabilities.

    I'm having some trouble with these... A test for Hepatitis A is 98% accurate: if a person has Hepatitis, the test will come out "positive" with...

    Started by DAI&DF‎, 05-31-2008 11:29 PM
    • Replies: 7
    • Views: 6,749
    06-01-2008, 06:51 PM Go to last post
  40. Golf Probability Again

    This problem is really bothering me cause I can't figure it out at all...so I'm gonna try reposting it if that's ok: Harry is an employee at a...

    Started by DAI&DF‎, 06-02-2008 07:15 AM
    • Replies: 4
    • Views: 1,992
    06-02-2008, 03:44 PM Go to last post
  41. Post test question

    At a large department store, the average number of years of employment for a cashier is 5.7 with a standard deviation of 1.8 years and the...

    Started by dailya1‎, 10-17-2010 09:28 PM
    • Replies: 1
    • Views: 5,877
    10-17-2010, 11:18 PM Go to last post
  42. Previously Posted Question

    I am trying to view the attachments that are connected to this previous thread. Can anyone help. http://www.talkstats.com/showthread.php?t=1301 ...

    Started by daisy_lynn‎, 05-11-2007 02:12 PM
    • Replies: 1
    • Views: 2,560
    05-21-2007, 02:38 AM Go to last post
  43. Am I doing this right?

    :confused: Im not sure if im doing this right. This is the question that I am working on right now. You wish to open a new restaurant and are...

    Started by daisy_lynn‎, 05-11-2007 05:38 PM
    • Replies: 1
    • Views: 2,572
    07-04-2007, 01:44 AM Go to last post
  44. Probability question (league related)

    I have a question that I figured I post to see some other people opinions. I'm part of a sport where there are multiple individual leagues of 12...

    Started by dak11‎, 12-08-2005 02:46 PM
    • Replies: 1
    • Views: 2,938
    12-08-2005, 03:26 PM Go to last post
  45. I have a probability problem I need help in

    I figured out most of it need help in other parts

    Started by dakodost‎, 07-28-2012 12:58 AM
    • Replies: 3
    • Views: 1,669
    07-30-2012, 01:31 PM Go to last post
  46. Poisson Process

    Hello I really need help with this problem and I have to show my work. We went over the Poisson equation but I can't figure out how to plug...

    Started by dalekissell‎, 04-27-2010 09:46 PM
    • Replies: 1
    • Views: 6,045
    04-28-2010, 12:49 AM Go to last post
  47. customer service problem

    N customers circulate in a closed system with two servers. In Server 1 and Server 2, service times are exponential with parameters 1 and 2,...

    Started by dalibocai‎, 04-17-2012 09:12 PM
    markov chains, stochastic process
    • Replies: 0
    • Views: 900
    04-17-2012, 09:12 PM Go to last post
  48. Combining multiple probabilistic weather signals with cumulative binary dist

    If I have a stable of separate, independent models (N = 19 of them) that are using different inputs to each generate a probabilistic forecast for...

    Started by dallasdallas‎, 02-08-2017 09:33 PM
    • Replies: 0
    • Views: 1,437
    02-08-2017, 09:33 PM Go to last post
  49. Dice probability with limited reroll

    Hello, I'm having difficulty understanding this problem and I was wondering if someone had an answer. Let n = \text{Number of dice} = 3 p_s...

    Started by Dan K‎, 03-20-2016 06:26 PM
    dice, probability
    • Replies: 2
    • Views: 1,624
    03-23-2016, 12:13 PM Go to last post
  50. Is this a standard distribution?

    Hello, Please pardon my LaTeX, but does anyone recognize this probability distribution? \frac{ (1-w)^{n_1} w^{n_2} }{ ...

    Started by Dan the Chemist‎, 05-20-2010 03:05 PM
    • Replies: 6
    • Views: 2,552
    05-22-2010, 04:26 AM Go to last post
  51. poisson probability problem

    I have constructed this experiment to better understand poisson probabilities. Problem: There are two sets of data: lets choose a poisson type...

    Started by Dan The Man‎, 02-15-2008 05:54 PM
    • Replies: 1
    • Views: 2,724
    02-16-2008, 04:00 PM Go to last post
  52. conditional expectation given sum

    Hello, I need your help. Suppose: X\sim N(0,\sigma^2_x), Y\sim N(0,\sigma^2_y) , X, Y are independent, and c\in R. I need to find an...

    Started by dan25‎, 07-28-2016 03:58 PM
    • Replies: 0
    • Views: 2,256
    07-28-2016, 03:58 PM Go to last post
  53. Dice probability

    Hello people, I have a very simple probability question that I need to solve a problem (recreational mathematics). Anyway, I would like to know how...

    Started by DanFran‎, 09-08-2011 09:55 AM
    • Replies: 3
    • Views: 2,018
    09-08-2011, 11:52 AM Go to last post
  54. Expected value of logarithm of determinant of Wishart-distributed matrix

    Does anyone know a simple, or at least tractable, formula for E, where W is a real Wishart-distributed matrix? It seems like there ought to be one,...

    Started by Daniel Dvorkin‎, 11-27-2011 03:16 PM
    determinant, log-determninant, multivariate, wishart
    • Replies: 3
    • Views: 4,923
    11-27-2011, 11:52 PM Go to last post
  55. Generalized multivariate t / Pearson Type VII distribution with vector d.f.?

    Does anyone know if there's such a thing as a multivarate t or Pearson Type VII distribution with vector-valued rather than scalar-valued degrees of...

    Started by Daniel Dvorkin‎, 04-07-2012 11:08 AM
    • Replies: 0
    • Views: 2,301
    04-07-2012, 11:08 AM Go to last post
  56. Sum of uniform distribution

    I would be very grateful if anyone could help me with this problem! In a market simulation I have multiple shouts i.e. bids and asks for which I...

    Started by daniel23‎, 04-07-2011 11:28 AM
    • Replies: 5
    • Views: 6,021
    04-07-2011, 01:07 PM Go to last post
  57. How many paths exist, probability, etc.

    Thanks for helping. I am taking an online course. Normally I would post my attempt...but I seriously do not know how to start this problem. I am...

    Started by DanielB33‎, 10-01-2017 10:30 AM
    • Replies: 1
    • Views: 247
    10-02-2017, 08:07 PM Go to last post
  58. Which probability distribution do I use for this, and how?

    Hi all, Im not a statistitian, although I have some reasonable education in mathematics. This isn't a homework question (I'm 37 lol), its just...

    Started by danlightbulb‎, 05-25-2017 04:25 PM
    • Replies: 9
    • Views: 1,186
    05-30-2017, 05:02 PM Go to last post
  59. Binomial probablity

    According to National Highway traffic Safety Administration 66% of California motorists use seat belts. Find the probablity that in one group of 12...

    Started by danny.kay‎, 12-24-2006 08:44 AM
    • Replies: 1
    • Views: 2,820
    12-27-2006, 12:20 AM Go to last post
  60. Process capability without variability in data?

    My company uses Cpk to judge process capability, with a 1.33 Cpk being the acceptable minimum for most processes. In some cases, we do not have...

    Started by Dannyboy175‎, 09-09-2009 01:34 PM
    • Replies: 5
    • Views: 7,408
    09-11-2009, 06:41 AM Go to last post

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