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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: 30,326
    09-30-2005, 09:44 AM Go to last post
  1. Arithmetic proof of predicted values

    Maybe the title of this thread should be: Arithmetic proof of predicted values or Why you shouldn't let stats lie dormant in your life for 7...

    Started by davidbgonzalez‎, 02-25-2011 12:26 PM
    discrete response models, probability question, proof
    • Replies: 2
    • Views: 2,405
    02-25-2011, 01:08 PM Go to last post
  2. 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: 2,110
    11-27-2008, 10:58 AM Go to last post
  3. arrangement problem

    a class has 10 students,every student is given 3 mobile phones with 3 sim for free communication... for every sim ,a set of duplicate sim is...

    Started by jyoti‎, 07-26-2013 02:11 AM
    • Replies: 0
    • Views: 1,488
    07-26-2013, 02:11 AM Go to last post
  4. Arranging letters

    What is the probability that an arrangement of a, b, c, e, f, g begins and ends with a vowel.

    Started by iwonde‎, 10-08-2008 01:42 AM
    • Replies: 1
    • Views: 4,291
    10-08-2008, 02:13 AM Go to last post
  5. Arrival time

    Suppose there are five people, let t1 be the first arrival time which van be computed from min{X1,...,X5} t2 is the time of the next and so on. and...

    Started by karaks5‎, 01-17-2017 05:37 AM
    arrival time, exponential distribution
    • Replies: 0
    • Views: 2,110
    01-17-2017, 05:37 AM Go to last post
  6. Assesin expected value of X1>X2 after many permutations of not unique values

    Hi all! I have following problem: I have n observed values (some of them are not unique). I permute them many times. Each time I only look at the...

    Started by Maverick85‎, 04-14-2010 02:51 PM
    • Replies: 3
    • Views: 4,037
    04-15-2010, 06:54 AM Go to last post
  7. Assesing normality - Amateur question

    Hi everybody, (First of all, excuse my poor english : It's not my native tong). I'm working for myself on a computer programm which will deal...

    Started by OlivierT‎, 11-04-2006 10:34 AM
    • Replies: 4
    • Views: 4,147
    01-21-2008, 11:11 AM Go to last post
  8. Assessing goodness of fit across many variables in R in one session.

    Hi all I'm just getting started in R and would like some help with the following problem which could make life easier I hope! I have data set...

    Started by troot‎, 09-05-2011 01:18 AM
    • Replies: 5
    • Views: 1,960
    09-06-2011, 05:54 PM Go to last post
  9. Assignment Problem ((urgent))

    Hey all. I am having some difficulty with one question on an assignment I have been workiing on. I am quite new to stats and I cannot find a...

    Started by Georgyb‎, 08-20-2011 11:09 PM
    • Replies: 4
    • Views: 2,462
    08-21-2011, 01:34 AM Go to last post
  10. Assistance Please

    I'm having a tough time with my online stat course. Very limited feedback from instructor and I feel somewhat on my own. Can someone assist with...

    Started by amanda145‎, 11-04-2014 10:26 AM
    homework
    • Replies: 1
    • Views: 1,244
    11-04-2014, 12:56 PM Go to last post
  11. Assistance with Monte Carlo Method for Board GAme

    Outcomes 16 cards. The cards have up to four values. I need assistance building a data set I can analyze. Simulating a starting hand, and...

    Started by Butlertom‎, 01-25-2016 08:18 PM
    • Replies: 5
    • Views: 1,897
    01-27-2016, 06:58 PM Go to last post
  12. Question Assistance with Probability example

    Consider a very simple card game, there are 16 cards. The cards have 4 ranks (Jack, King, Queen and Ace) and 4 suits (Clubs, Diamonds, Hearts and...

    Started by bensfriend1‎, 01-28-2016 07:02 AM
    • Replies: 0
    • Views: 1,037
    01-28-2016, 07:02 AM Go to last post
  13. Question Assistance with probability problems before exam

    Hello, I am a student in International Trade and I have a Statistical exam tomorrow (in 12 hours to be precise). I would really need your help and...

    Started by Ninjahouse‎, 01-29-2016 03:20 PM
    • Replies: 0
    • Views: 1,048
    01-29-2016, 03:20 PM Go to last post
  14. Astronomer's estimate

    I am trying to solve the problem but end up with no where, Please help me to solve the problem Astronomers estimate that as many as one hundred...

    Started by debaprosad‎, 09-15-2014 11:46 AM
    • Replies: 3
    • Views: 2,552
    09-16-2014, 03:59 PM Go to last post
  15. Asynchronis Particle Counting

    I have particles incident on a detector at 1000 events/sec. My detector is turning on and off at 1000 e/s bu only for 10% of the time, asynchronis to...

    Started by dfperrault‎, 02-14-2013 05:27 PM
    • Replies: 0
    • Views: 1,016
    02-14-2013, 05:27 PM Go to last post
  16. At least n of

    Consider a genetic mutation. For anyone that has this mutation, there is a 50% probability their child(ren) will also have it. If the child has the...

    Started by jonathannah‎, 10-21-2011 12:25 AM
    • Replies: 3
    • Views: 2,019
    10-21-2011, 12:14 PM Go to last post
  17. autoregressive

    hi folks, i am using 2nd order autoregressive for prediction. my equation is y(t)=b1 + b2*y(t-1) + b3*y(t-2). i found the coefficients b1,...

    Started by ashraf_leaf‎, 08-12-2008 10:37 AM
    • Replies: 3
    • Views: 1,901
    08-13-2008, 11:14 AM Go to last post
  18. Average probability and empirical probability

    This is probably very simple. The problem I have relates to a far more complex calculation, but if I can understand the maths it will be easy enough...

    Started by rancid98‎, 09-19-2006 08:27 PM
    • Replies: 2
    • Views: 4,299
    09-24-2006, 09:08 PM Go to last post
  19. Average Probablities over a quarter

    Hi all, I have the following probability data for a medical event, I need to find what was the overall probability for these three month? 1-...

    Started by alex_a‎, 10-31-2016 10:10 AM
    • Replies: 1
    • Views: 2,447
    10-31-2016, 01:48 PM Go to last post
  20. Average Profit

    Hello, This question has been really confusing me and I was wondering if someone can help me out. The question is as follows: A large...

    Started by sp00ky‎, 10-06-2007 01:38 PM
    • Replies: 1
    • Views: 3,532
    10-06-2007, 06:11 PM Go to last post
  21. Average time needed..

    Dear Talk Stats users, First of I'm glad I found this forum and to be part of it! To keep a long story short: I've got a problem with an exercise...

    Started by Logistics‎, 11-02-2015 12:33 PM
    • Replies: 2
    • Views: 1,427
    11-02-2015, 01:27 PM Go to last post
  22. averages and probability

    2. The grades in a course have an average of 72 with a standard deviation of 15. Assume they are normally distributed. a) What score is...

    Started by toronto416‎, 06-20-2008 12:41 PM
    • Replies: 2
    • Views: 2,832
    06-21-2008, 03:07 PM Go to last post
  23. Axioms of probability and sigma additivity

    The third axiom of probability states that given an infinite sequence of mutually exclusive events A1, A2, .... we have P(A1 U A2 U ...) = P(A1) +...

    Started by Weiss‎, 01-27-2017 10:05 PM
    additivity, axiom, measure
    • Replies: 6
    • Views: 4,570
    02-03-2017, 04:06 PM Go to last post
  24. baby probability help

    Hi, with this problem "Tom flips 3 fair coins and Joan flips 2 and Tom wins if he gets more heads than her. What is probability that Tom wins?" At...

    Started by probber‎, 05-08-2006 02:49 PM
    • Replies: 9
    • Views: 3,052
    05-10-2006, 08:22 AM Go to last post
  25. Baccalaureate Preferences by Gender Question

    I am doing a study on baccalaureate preferences by gender and I have questions about estimating a particular institution's expected male/female...

    Started by Onhech2‎, 09-27-2014 02:12 PM
    • Replies: 0
    • Views: 1,517
    09-27-2014, 02:12 PM Go to last post
  26. Backpropagated Probabilities

    To All: First, I am not sure if backproagation is the right way to define what I am looking at, but it appears to at least take the smallest...

    Started by bvw1987‎, 11-03-2014 09:38 PM
    • Replies: 2
    • Views: 1,134
    11-03-2014, 10:29 PM Go to last post
  27. Backwards probability: estimate an original content from a sample

    Hello, Here is my problem. In a container are between 10power5 to 10power9 unique elements, each of them could be present several times...

    Started by mousme‎, 05-15-2012 11:25 AM
    • Replies: 0
    • Views: 1,583
    05-15-2012, 11:25 AM Go to last post
  28. bag of marbles

    A bag with red marbles and blue marbles has more blue than red. If you add red marbles until 1/3 of the marbles in the bag are blue; yellow marbles...

    Started by Whitney‎, 10-04-2006 11:33 PM
    • Replies: 0
    • Views: 2,656
    10-04-2006, 11:33 PM Go to last post
  29. ball drop in a maze

    A ball bearing is dropped at the top of the maze (see diagram). It has a 50% chance of going left or right at each junction. Find the probability...

    Started by Hans Rudel‎, 04-24-2012 01:13 PM
    • Replies: 7
    • Views: 4,049
    04-27-2012, 02:33 PM Go to last post
  30. ball game

    sorry I got it now, thanks, can someone delete this for me?

    Started by initialize‎, 03-02-2010 09:11 PM
    • Replies: 0
    • Views: 3,017
    03-02-2010, 09:11 PM Go to last post
  31. Balls in a jar

    I wonder if my approach to this is correct- Say I have a jar with 10 balls, 9 of which are green and 1 that is red. I start taking out a ball at a...

    Started by fiffette‎, 08-26-2013 12:06 PM
    • Replies: 12
    • Views: 3,045
    08-27-2013, 11:14 AM Go to last post
  32. Balls in buckets ...

    Suppose there are T buckets in a room. Suppose further that there are two individuals, 1 and 2, who each have B1 and B2 tennis balls, where B1...

    Started by BigBugBuzz‎, 01-16-2013 05:32 AM
    combinatorics
    • Replies: 4
    • Views: 1,616
    01-16-2013, 09:14 AM Go to last post
  33. Bartels: Cycles test of signifcance

    I have this pdf doc that explains the formula of Bartels , the test of a cycle significance on a time series. I am trying to put it into excel .....

    Started by icm63‎, 08-21-2010 08:02 PM
    • Replies: 1
    • Views: 4,442
    01-22-2013, 04:03 AM Go to last post
  34. Basic (or maybe not so) probability problem/experiment/question.

    I came upon an interesting probabilistic assertion in a book I'm reading. Here's the quote: "Once in a while we find co-occurrences, and we're...

    Started by bfotk‎, 09-05-2011 05:23 PM
    probability question
    • Replies: 6
    • Views: 2,745
    09-06-2011, 03:20 AM Go to last post
  35. Basic binomial question (normal curve approximation)

    Hello, Could you please give me some guidance on the question below: 5. A multiple-choice test consists of 25 questions, each with four possible...

    Started by pcampin‎, 12-19-2011 05:14 PM
    • Replies: 4
    • Views: 2,110
    12-20-2011, 01:42 PM Go to last post
  36. Basic Binomial Question. Help please.

    **********Please ignore this post, I think I've got it now**************** Hello, The question is: 5. According to a recent poll, 30%...

    Started by pcampin‎, 12-16-2011 02:45 PM
    • Replies: 1
    • Views: 2,054
    12-16-2011, 03:23 PM Go to last post
  37. Basic Combination problem

    Hey guys i am really stuck on this problem: At a recent gathering there were 7 musicians, 10 teachers, and 3 accountants, all noted for their love...

    Started by fred_720‎, 12-14-2009 01:14 PM
    • Replies: 1
    • Views: 2,562
    12-26-2009, 02:17 PM Go to last post
  38. basic concept check

    1. If event A and B are independent, would the conditional probability of B given A=1? I say false because it should =p(B) not 1. 2. If event A is...

    Started by kevin.lated‎, 01-27-2012 03:11 PM
    • Replies: 1
    • Views: 1,580
    01-27-2012, 03:19 PM Go to last post
  39. Basic correlation matrix question

    I am new to statistics. I have a signal u(n) = .4s(n)+.7s(n-1)-.1s(n-2) +v(n) where v(n) has variance .003 E yields .4^2 +.7^2 +(-.1)^2...

    Started by nikki101‎, 02-23-2014 08:35 PM
    • Replies: 1
    • Views: 1,045
    02-23-2014, 08:45 PM Go to last post
  40. basic lotto question

    Hi there, I was always confused with combinations etc but in most cases I was able to find my way out. But this one is really annoying me: ...

    Started by leo nidas‎, 03-19-2011 11:33 AM
    basic, otto, question
    • Replies: 1
    • Views: 2,283
    03-19-2011, 11:37 AM Go to last post
  41. basic probability

    My assignment question gives me the following info regarding the probability of system having 3 types of defects (type A1, A2, and A3): P(A1)=...

    Started by andrewink‎, 09-28-2008 02:49 PM
    • Replies: 1
    • Views: 2,838
    09-28-2008, 06:29 PM Go to last post
  42. Basic probability

    Lets say that I have a population of 2^24 individuals. Each individual, including myself and friends has assigned an individual number. One of them...

    Started by jninguem‎, 10-01-2009 03:42 AM
    • Replies: 0
    • Views: 1,947
    10-01-2009, 03:42 AM Go to last post
  43. Arrow Basic Probability

    6 Boys and 6 Girls sit in a row at random. Find the probability that the boys and girls sit alternately. Please help me with steps to calculate in...

    Started by sukumartenth‎, 10-29-2010 03:28 AM
    • Replies: 9
    • Views: 4,059
    10-29-2010, 03:58 PM Go to last post
  44. Basic probability

    Whilst I've done pg stats (like 30+ years ago) and still use them a bit, I'm now wishing to look more closely at the basis of probability. With that...

    Started by Zarathrustra‎, 07-18-2011 11:48 AM
    • Replies: 0
    • Views: 2,385
    07-18-2011, 11:48 AM Go to last post
  45. Poll Poll: Basic Probability 2

    Four Coins are tossed together. What is probability that HEAD will appear on at least on of the four coins?

    Started by sukumartenth‎, 10-29-2010 10:12 AM
    • Replies: 6
    • Views: 3,187
    11-01-2010, 03:28 AM Go to last post
  46. Poll Poll: Basic Probability 3

    Please help me with this question Two cards are drawn at random from a pack of cards. Find the probability that both cards are of Red Colour or...

    Started by sukumartenth‎, 11-01-2010 03:40 AM
    • Replies: 6
    • Views: 3,878
    11-01-2010, 12:06 PM Go to last post
  47. Basic probability distribution table problem

    "What is P(X>4.74)". Can someone please explain how I'd go about this? Would it just be P(5) + P(6)? Thanks a lot.

    Started by touran‎, 03-19-2017 01:49 PM
    • Replies: 1
    • Views: 1,412
    03-19-2017, 02:51 PM Go to last post
  48. Basic Probability help required.

    Hi, Im new to the site so apologies if I haven't posted the question correctly. But here goes, I have been given this question as an example to...

    Started by rookie88‎, 11-13-2015 09:48 AM
    • Replies: 0
    • Views: 932
    11-13-2015, 09:48 AM Go to last post
  49. Basic Probability Homework

    We just stated to have about probability at the ongoing course. We have this Exercise which I, apparently, cannot figure out how to calculate. "...

    Started by hotjer‎, 10-10-2011 06:11 AM
    • Replies: 4
    • Views: 3,288
    10-10-2011, 08:13 AM Go to last post
  50. 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: 2,006
    05-03-2011, 07:05 AM Go to last post
  51. basic probability query

    I have two datasets each with 18 unique records. I am using a randomising function to assign numbers from 1 to 18 for each table and then join them...

    Started by kdt2006‎, 12-07-2007 11:36 AM
    • Replies: 3
    • Views: 2,835
    12-10-2007, 10:27 AM Go to last post
  52. basic probability question

    Probability of 12 defects in one batch = 0.3060 If two more batches are produced, find the probability that all 3 batches will contain at least 12...

    Started by davidfsmith‎, 04-02-2006 03:14 PM
    • Replies: 2
    • Views: 2,669
    04-03-2006, 03:00 PM Go to last post
  53. Basic Probability Question

    I have a question regarding basic proability. In the problem outlined below I am worried that I have calculated incorrectly. More specifically, I...

    Started by caransom‎, 10-21-2006 05:42 PM
    • Replies: 2
    • Views: 4,695
    10-22-2006, 02:53 PM Go to last post
  54. Question Basic Probability question

    Hello everyone, new to statistics and new here! I'm working on a question and for the life of me cant seem to get my head round the initial steps,...

    Started by lazaah‎, 05-17-2011 07:41 AM
    • Replies: 1
    • Views: 1,461
    05-17-2011, 08:50 AM Go to last post
  55. Basic probability question

    f(x) = x/4 for 0<x<2 = 1- x/4 for 2<x<4 = 0 otherwise Find c1 and c2 such that probability of (c1<x<c2)=0.6 So I tried to plot the...

    Started by ahoy‎, 10-14-2011 04:58 PM
    • Replies: 3
    • Views: 1,819
    10-15-2011, 03:27 AM Go to last post
  56. Basic Probability Question

    If I have the following data set, Event - Failure Frequency (failures/yr) 1 - 0.12 2 - 0.50 3 - 0.50 4 - 0.29 5 -...

    Started by mjm8110‎, 06-06-2012 06:16 PM
    • Replies: 0
    • Views: 1,323
    06-06-2012, 06:16 PM Go to last post
  57. Basic probability question

    This is a probability question centered around some pseudo code, enjoy! n<-number of rows(x) max<-x for (i in 1 to n) do if x > max then...

    Started by murwebb‎, 01-05-2013 06:08 PM
    probability
    • Replies: 7
    • Views: 1,898
    01-07-2013, 03:16 PM Go to last post
  58. Basic Probability Question

    Hi, could anyone point out the methodology I should use the answer the question below? Your wisdom is much appreciated! Question: "Between...

    Started by ShareTheGlobe‎, 04-10-2016 03:31 AM
    • Replies: 0
    • Views: 1,711
    04-10-2016, 03:31 AM Go to last post
  59. Basic Probability Question Help

    I need help with 2 questions: 1) In a shipment of 18 trucks to a local truck dealer, there are 4 trucks that don't have air conditioning. Assume...

    Started by sstrunks52005‎, 10-04-2010 09:14 AM
    • Replies: 3
    • Views: 3,908
    10-04-2010, 10:30 AM Go to last post
  60. basic probability questions (pictures inside) Help!

    i wish i could say i knew somewhat of where to start for these problems but i dont. My teacher is not the best and the homeworks are always...

    Started by yopy‎, 10-13-2009 09:26 PM
    • Replies: 1
    • Views: 3,852
    10-16-2009, 12:07 PM Go to last post

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