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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: 30,175
    09-30-2005, 09:44 AM Go to last post
  1. probability

    probability

    Started by asonibareoyindamola‎, 02-10-2017 07:49 PM
    • Replies: 1
    • Views: 1,868
    02-10-2017, 08:03 PM Go to last post
  2. Scoring at least once out of ten attempts

    A football player has the chance of 0.14 to score (single kick). If he kicks the ball 10 times, what is his chance of scoring at least once? Can...

    Started by Assaf‎, 02-20-2016 10:00 AM
    coin flips, cumulative probability, distributation
    • Replies: 3
    • Views: 1,684
    02-20-2016, 05:28 PM Go to last post
  3. Question Simple conditional probabilities

    Hello, I am currently reading an image processing paper that involves conditional probabilities in one section, but my probability classes are way...

    Started by assis‎, 02-14-2013 08:12 PM
    • Replies: 1
    • Views: 1,741
    02-15-2013, 12:31 AM Go to last post
  4. Confirm my results for me

    1. The police confiscated 500 tablets suspected to contain ecstasy. A sample of 15 tablets were sent to the laboratory for analysis. After getting...

    Started by asterlaw‎, 02-14-2013 02:02 PM
    • Replies: 1
    • Views: 1,604
    02-14-2013, 02:45 PM Go to last post
  5. Lightbulb Bayes Theorem

    I have been doing some problems with Bayes Theorem, but I have one question that is more complex than the others and was wondering if anyone can help...

    Started by AStudent‎, 02-09-2008 11:03 AM
    • Replies: 1
    • Views: 3,085
    02-10-2008, 08:29 PM Go to last post
  6. Noise distribution in multi-variate signal - research question

    Hello all, I could use a hand with a question holding up some research. I am trying to calculate the signal to noise ratio on a signal which is...

    Started by asw20‎, 11-12-2013 04:01 PM
    • Replies: 2
    • Views: 1,621
    11-13-2013, 11:31 AM Go to last post
  7. normal distribution

    Please explain me how to do that? What is the probability that a worker at Random drives more that 15 miles to work if the distribution of all...

    Started by Asya‎, 12-03-2011 03:31 PM
    • Replies: 7
    • Views: 2,252
    12-03-2011, 05:21 PM Go to last post
  8. Extremely Simple Probability Calculation

    I am working on a project (non-school, non-homework, math for fun :D) in which I need to determine a fairly simple probability. I need to determine...

    Started by athingonetime‎, 12-08-2012 12:31 AM
    probability
    • Replies: 5
    • Views: 1,193
    12-08-2012, 04:22 PM Go to last post
  9. percentile for (1 - cumulative distribution function)

    Hi, Before addressing my question, please let me define the context: The percentile is usually defined as the value of a variable BELOW which a...

    Started by athos‎, 11-20-2010 07:26 PM
    • Replies: 4
    • Views: 12,902
    01-04-2011, 10:09 AM Go to last post
  10. binomial distribution with random p?

    I haven't much training in statistics or math in general, but I was playing around with a signalling model I'm building, mostly for fun, and ran into...

    Started by AtlasFrysmith‎, 12-08-2008 05:00 PM
    • Replies: 2
    • Views: 2,997
    12-08-2008, 11:42 PM Go to last post
  11. Probability Brain Teaser

    You have 6 pairs of socks - 2 white, 2 black, 2 green You need a matching pair in either white or black - but the lights are out, so you have to...

    Started by atldevilz‎, 11-12-2012 08:42 PM
    brain teaser, probability help
    • Replies: 3
    • Views: 1,416
    11-12-2012, 10:00 PM Go to last post
  12. Please Help !

    Find the stationary distribution for a markov chain with two states 1,2 and 0 < P11 = a < 1,0 < P22 = b < 1. Use the balance of flows to and from...

    Started by atrangi‎, 12-04-2007 12:47 PM
    • Replies: 0
    • Views: 2,709
    12-04-2007, 12:47 PM Go to last post
  13. Probability Question

    A billion thanks to anyone who can help me with this problem: Let's say that there is a deck of only six cards labeled A through F And each...

    Started by ATTC‎, 02-11-2008 08:29 PM
    • Replies: 0
    • Views: 1,850
    02-11-2008, 08:29 PM Go to last post
  14. should bayes therom be used?

    Seems like a relatively simple question, but I'm missing it: There are 25 delinquent accounts in 100 accounts. If I choose 75 accounts out of the...

    Started by auditor‎, 04-27-2016 09:31 PM
    • Replies: 2
    • Views: 1,241
    05-15-2016, 06:41 AM Go to last post
  15. Probability of rolling a 1 10% or less over # of trials?

    Hey guys, It's been years since I've taken a stats class and just need a refresher on how to calculate a problem of this form. Specifically, I'm...

    Started by aufvr‎, 11-14-2007 12:11 AM
    • Replies: 0
    • Views: 3,158
    11-14-2007, 12:11 AM Go to last post
  16. Unhappy Lottery 'week intervals'

    This strikes me as an interesting (though potentially tricky) lottery question that I'm having trouble getting my head around. Many state...

    Started by AussieBob‎, 07-29-2012 12:36 AM
    probability question, statistic
    • Replies: 0
    • Views: 2,011
    07-29-2012, 12:36 AM Go to last post
  17. Different Interpretations of the Central Limit Theorem

    My friend and I are having an argument about the meaning of CLT. It led to me build this javascript experiment which you may enjoy:...

    Started by aut0pilot101‎, 06-18-2013 06:59 PM
    • Replies: 2
    • Views: 3,283
    06-18-2013, 07:33 PM Go to last post
  18. Question Please Help on Joint Probability Question

    Hi, I'm having trouble with a homework problem and I was wondering if someone could walk me through it a bit. Alex and Yan agree to meet at the...

    Started by avalanche72‎, 05-13-2012 10:57 PM
    • Replies: 1
    • Views: 1,397
    05-14-2012, 12:19 AM Go to last post
  19. Help!!!

    I have two questions from an assignment that are stumping me. Although I'm sure they're simple this is an online summer class and the professor isn't...

    Started by avanbel2‎, 05-31-2007 09:45 PM
    • Replies: 3
    • Views: 3,677
    06-01-2007, 08:14 AM Go to last post
  20. Need help for interpreting the simulation results...

    Hi all, I performed a simulation study on R for bootstrap, permutation and classic version of hotelling T^2 test, Goodall F , and James T test ...

    Started by avataravatar‎, 01-11-2011 08:24 AM
    • Replies: 0
    • Views: 2,142
    01-11-2011, 08:24 AM Go to last post
  21. 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: 1,742
    06-29-2015, 02:38 PM Go to last post
  22. Incidence rate in population and in random sample

    How can I anser a question like the following: When the true incidence rate of an event in the population is "X" (say, 12%), how likely is it that...

    Started by AVoelp‎, 08-25-2016 10:09 AM
    • Replies: 1
    • Views: 1,032
    08-25-2016, 04:16 PM Go to last post
  23. a question about discrete RV

    hello, I have a question about discrete RV. Five fair coins are tossed. The coins that fall on "Head" are removed and the rest of them are tossed...

    Started by avsha43‎, 08-07-2014 03:56 PM
    • Replies: 11
    • Views: 1,686
    08-08-2014, 07:38 AM Go to last post
  24. Probability confusion

    Hi guys, I have a question here. I understand the reasoning behind the solution, but I am also wondering about why an alternative solution is not...

    Started by AWayWithWords‎, 04-12-2010 09:13 PM
    • Replies: 3
    • Views: 3,378
    04-13-2010, 09:14 PM Go to last post
  25. Video Forensics; Pattern recognition and extrapolation

    I'll just start from the beginning. The police edited an arrest video and the regional FBI office is acting like they can't prove it. Wish I was...

    Started by AwsedreswA‎, 01-06-2014 11:39 AM
    • Replies: 0
    • Views: 1,145
    01-06-2014, 11:39 AM Go to last post
  26. ARL - U Chart using poisson tables?

    How do you determine the average run length of a u-Chart when process is im control using Poisson tables???

    Started by axnman‎, 11-27-2008 10:58 AM
    • Replies: 0
    • Views: 2,096
    11-27-2008, 10:58 AM Go to last post
  27. When does the Normal Distribution arise?

    Hello guys, Studying the multivariate normal distribution (and the univariate one as well), I found in Muirhead (1982) that the normal distribution...

    Started by Axs_Souza‎, 11-23-2014 04:57 PM
    normal distribution, random effects
    • Replies: 1
    • Views: 2,271
    11-23-2014, 05:19 PM Go to last post
  28. Question HELP studying for a FINAL EXAM

    Hello everyone, I have a final that I am studying for, the final isnt till thursday. But I am having problems soving some probability problems, I...

    Started by Ayisha‎, 03-20-2006 06:39 PM
    • Replies: 0
    • Views: 2,530
    03-20-2006, 06:39 PM Go to last post
  29. MGF, Moment-Generating Function

    Let X1 and X2 be two independent random variables. Let X1 and Y = X1 + X2 be χ2(r1) (Chi Square) and χ2(r), respectively, where r1 < r. (a) Find...

    Started by aytajalli‎, 01-29-2015 11:50 PM
    chi square, mgf
    • Replies: 4
    • Views: 1,482
    01-31-2015, 04:58 PM Go to last post
  30. Bernoulli distribution and PGF

    let Yi,j be independent Bernoulli random variables with E = 1/j. Let Zj = sumYi,j for i=1 to j . Let MZj(s) be the probability generating function...

    Started by aytajalli‎, 02-10-2015 06:11 PM
    • Replies: 6
    • Views: 2,313
    02-12-2015, 01:37 PM Go to last post
  31. Exponential Distribution with uniform random variables

    I choose Θ according to the exponential distribution with mean 1. I then choose 10 i.i.d. random variables X1, . . . , X10, where each Xi has...

    Started by aytajalli‎, 02-11-2015 03:11 PM
    • Replies: 2
    • Views: 1,980
    02-11-2015, 11:42 PM Go to last post
  32. Distribution of β hat sigma hat

    This is my problem: Find the distributions of β-hat and σ2-hat for Yi = βxi + εi Is this prove sounds right?

    Started by aytajalli‎, 02-20-2015 12:50 PM
    • Replies: 1
    • Views: 3,515
    02-20-2015, 01:04 PM Go to last post
  33. Calculating the expected value

    Hi, I have a strange problem. Following info is provided: Event insurance comp. allows promoters of any event to protect themselves from financial...

    Started by Ayyappa‎, 05-26-2010 01:28 PM
    • Replies: 1
    • Views: 3,451
    05-26-2010, 01:57 PM Go to last post
  34. probability from moment generating function?

    if the moment generating of a random variable X is M_x(t)=(1-t)^-2 compute P(-2 < X < 3) or explain why it cannot be computed how do I do...

    Started by azazaz‎, 04-08-2009 08:14 AM
    • Replies: 4
    • Views: 6,509
    04-10-2009, 08:27 AM Go to last post
  35. limits and independent rvs

    Let X_1, X_2,... be a sequence of independent r.v.'s with EX_i = miu_i, Var(X_i) = (sigma_i)^2, i= 1, 2,.... Assume that: i) lim n-> inf (...

    Started by azazaz‎, 04-08-2009 08:52 AM
    • Replies: 2
    • Views: 5,011
    04-10-2009, 08:30 AM Go to last post
  36. uniform random variables, max, sequence

    -qn solved-

    Started by azazaz‎, 04-10-2009 08:45 AM
    • Replies: 0
    • Views: 2,085
    04-10-2009, 08:45 AM Go to last post
  37. log-logistic distribution function

    I need to create a function (in Mathematica) to generate a log-logistic distribution (also called a Fisk distribution). I know the log-logistic...

    Started by a^2‎, 02-07-2008 11:01 AM
    • Replies: 0
    • Views: 5,075
    02-07-2008, 11:01 AM Go to last post
  38. Normal Average versus Weighted Average

    I'm taking a self-study course from "The Great Courses" called "Joy of Numbers". I'm on the lesson "Joy of Mathematical Games" and am confused by the...

    Started by B1966J‎, 10-29-2015 10:48 AM
    • Replies: 1
    • Views: 945
    10-29-2015, 02:07 PM Go to last post
  39. probability problem.. help?

    I have a question using the uniform probability where c=4 and d=10 Find k where P(2≤X≤k)=0.6 so (k-2)(1/6)=0.6 k-2=1 k=3 correct? TIA!

    Started by baby2k1‎, 04-27-2008 02:28 AM
    • Replies: 1
    • Views: 4,876
    04-27-2008, 10:23 PM Go to last post
  40. Multivariate Survival and Distribution Functions

    Hello, I would like to confirm if the attached relationship between the multivariate survival and the distribution functions is correct. I read...

    Started by bacalfa‎, 12-24-2013 01:56 PM
    • Replies: 2
    • Views: 1,340
    12-25-2013, 01:35 PM Go to last post
  41. Discrete Random Variables

    Its asking to complete the chart. Since its probability I added it up to have a one but the other chart has a negative does that mean that it can't...

    Started by badatstats‎, 07-12-2010 08:30 PM
    • Replies: 4
    • Views: 3,253
    07-12-2010, 09:10 PM Go to last post
  42. Mutually Exclusive

    I can't seem to remember how to determine what P(A|B) is if the two events are determined to be mutually exclusive with probabilities P(A)= 0.3 and...

    Started by badatstats‎, 08-10-2010 04:16 PM
    • Replies: 2
    • Views: 2,487
    08-10-2010, 04:41 PM Go to last post
  43. Probability of sum of 6 digit number

    Hi, What is the probability of sum of any 6 digit number (ranging from 000000 to 999999) to be equal to 12. Actually I am looking for the...

    Started by badaya‎, 06-14-2013 11:47 AM
    • Replies: 6
    • Views: 3,910
    06-14-2013, 01:42 PM Go to last post
  44. 7 Balls in 7 Buckets

    Hi, Say I have 7 balls I can put in 7 different buckets. Define Xn to be the number of buckets with n balls. For instance X3 = 1 is the number of...

    Started by badmax‎, 07-24-2013 11:10 PM
    • Replies: 0
    • Views: 1,144
    07-24-2013, 11:10 PM Go to last post
  45. Problem of ball & buckets (# balls, # buckets and # max. capacity per bucket)

    I need to resolve the following problem: There are 6 buckets and each bucket can hold a maximum of 16 balls (it could be 0 to 16 balls with equal...

    Started by bagheera‎, 01-05-2011 11:54 PM
    • Replies: 0
    • Views: 3,716
    01-05-2011, 11:54 PM Go to last post
  46. multiplication rule with two random events?

    Exercise from mathint.com: "The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9 . If the...

    Started by bagocs‎, 10-03-2017 04:44 PM
    • Replies: 1
    • Views: 102
    10-06-2017, 03:41 PM Go to last post
  47. 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: 1,478
    08-31-2015, 06:45 AM Go to last post
  48. Do u know a statistical distribution with exponential moment generating function

    Hi When I involve with a problem about limiting distribution of Gama, I encounter with below moment generating function:...

    Started by bahri719‎, 10-19-2012 02:01 AM
    • Replies: 1
    • Views: 1,031
    10-19-2012, 03:00 AM Go to last post
  49. Conditional probability density function, practical example

    Greetings to all the ones who are accepting to help people and greeting to the ones who are browsing in the forum! We have 2 independent random...

    Started by Baillya‎, 10-02-2012 03:44 AM
    • Replies: 2
    • Views: 4,813
    10-03-2012, 03:07 AM Go to last post
  50. Need Help on Prob

    You are given three coins and told that two of them are biased and that they both have a 60% chance of coming up heads. The third coin is fair. You...

    Started by BaineHallow‎, 03-18-2008 12:59 AM
    • Replies: 2
    • Views: 2,638
    03-18-2008, 09:09 AM Go to last post
  51. Probability Problems

    Hello can someone verify if I am correct for these problems? A small package of alphabet soup noodles contain 3 As, 3 Bs and 3 Cs. You...

    Started by BaineHallow‎, 05-14-2008 06:04 PM
    • Replies: 1
    • Views: 2,934
    05-15-2008, 06:57 PM Go to last post
  52. Smile Please help me! binomial probability

    Hi everyone, I m new to stats and I m stuck with this two question for 2 hours now...I ll be really appreciate if someone here could show me how to...

    Started by baisha‎, 02-06-2011 06:48 AM
    • Replies: 2
    • Views: 6,850
    02-06-2011, 02:17 PM Go to last post
  53. Probability model on common cold

    Here is a probabilistic model for the spread of the common cold. We have two people in a room, one of them healthy, and immune, the other sick....

    Started by bakakage‎, 11-13-2008 10:33 PM
    • Replies: 0
    • Views: 2,314
    11-13-2008, 10:33 PM Go to last post
  54. Simple Probability problem

    Hello, First time user, long time visitor. I am hoping someone can and is willing to help me. I am stuck on this two part problem. It seems...

    Started by ball‎, 09-21-2012 01:37 PM
    • Replies: 3
    • Views: 2,174
    09-23-2012, 11:49 AM Go to last post
  55. Basic Probability Problem...

    A container has 20 green & 30 red balls. Five balls are randomly drawn with replacement. Let x be the number of green balls drawn. Find the...

    Started by balletgirl‎, 05-02-2011 05:01 PM
    • Replies: 2
    • Views: 1,995
    05-03-2011, 07:05 AM Go to last post
  56. Please, help with conditional probability

    You play with 2 opponents with whom you alternately play with probability p_A and p_B. p_B >= p_A. We want to minimize the number of games you...

    Started by bamby‎, 08-23-2009 04:23 PM
    • Replies: 0
    • Views: 2,617
    08-23-2009, 04:23 PM Go to last post
  57. null hypothisis and p value

    This is my question; A medical Researcher knows that the generally accepted level for Triglycerides in Adult Males is 110 mg/dl. Fearing that men...

    Started by bamfje@gmail.com‎, 04-02-2012 02:52 PM
    • Replies: 5
    • Views: 2,547
    04-02-2012, 03:45 PM Go to last post
  58. Numerical frequency analysis query

    Hi, I heard about this on radio 4 (UK) back in 2007. A statistical method whereby the frequency of integers in a dataset is calculated, then...

    Started by bamie9l‎, 03-08-2010 07:52 AM
    • Replies: 0
    • Views: 2,413
    03-08-2010, 07:52 AM Go to last post
  59. Probability of new lottery

    Hi everyone, I come from the Czech Republic and I received a business case at work. I am supposed to come up with a new lottery which would be a...

    Started by bananow‎, 10-01-2011 12:01 PM
    • Replies: 3
    • Views: 2,509
    10-01-2011, 03:07 PM Go to last post
  60. Lightbulb Probability of event

    Hello Friends I'll try to ask in very simple way I will have multiple choice test next month and i have 240 questions every question has 3...

    Started by banebt‎, 03-07-2011 09:03 AM
    multiple choice questions, probability
    • Replies: 7
    • Views: 3,521
    03-08-2011, 02:06 PM Go to last post

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