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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: 10,844
    09-30-2005, 09:44 AM Go to last post
  1. changing the frequency distribution with out the changing the shape of the disti

    i have frequency table of wind speeds from a measurement site and now i want to use that wind speed frequency table to find out wind speed at a...

    Started by codenamenikky‎, 08-15-2014 01:24 PM
    • Replies: 3
    • Views: 141
    08-15-2014, 05:14 PM Go to last post
  2. Question Probability that Bernoulli p-parameter is greater than some value, given N samples?

    Hello everybody, I have the following question. Assume I observe N outcomes from a Bernoulli random variable with unknown success parameter p....

    Started by hansel‎, 08-11-2014 05:18 PM
    bernoulli, confidence intervals, parameter estimation
    • Replies: 5
    • Views: 205
    08-14-2014, 01:52 PM Go to last post
  3. Multi-level Bayes

    I guess that this is a multi level Bayes problem but there maybe a better technical name for it that I am not aware. Three jars contain tokens of...

    Started by TedR‎, 08-13-2014 11:50 AM
    bayes
    • Replies: 2
    • Views: 109
    08-13-2014, 12:35 PM Go to last post
  4. Question exponential and deterministic random variable mix

    Assume that there is a Poisson random process which has a rate of λ that produce samples which has an exponentially distributed inter-arrival times,...

    Started by PrasadP‎, 08-12-2014 07:42 PM
    • Replies: 3
    • Views: 173
    08-13-2014, 07:28 AM Go to last post
  5. Set Completion Problem for a Set of Collectable Objects

    I'm trying to do some probability analysis for a digital collectable game called SolForge. There is a particular point in my analysis where I'm not...

    Started by Eyks‎, 08-09-2014 01:47 AM
    • Replies: 8
    • Views: 189
    08-10-2014, 05:09 AM Go to last post
  6. Given an Average for Drawing 6 Times, What Are the Odds When Drawing Once?

    Suppose we draw 6 times, with replacement, from a deck of cards with four suits. We do not know how many cards of each suit there are, nor how many...

    Started by Eyks‎, 08-09-2014 06:29 PM
    • Replies: 1
    • Views: 105
    08-10-2014, 04:47 AM Go to last post
  7. Statistically different tops for 2 parabolas with non-normal distributed data

    For situation 1 and 2 from my data came two parabola relations between variables X and Y. (the two parabolas have both a maximum) My question is...

    Started by rob1‎, 07-30-2014 05:32 PM
    • Replies: 8
    • Views: 371
    08-08-2014, 11:20 AM Go to last post
  8. 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: 216
    08-08-2014, 07:38 AM Go to last post
  9. Drawing tokens from a bag - probability of getting 2(a) out of 3 draws

    EDIT: Please see my last post for my latest revelation/question regarding this problem! Hi all, first time poster here... I'm creating a...

    Started by bgm1961‎, 08-06-2014 11:43 AM
    bag, drawing, outcomes
    • Replies: 3
    • Views: 168
    08-07-2014, 12:08 PM Go to last post
  10. Ploting Positions from Peak Over Thresold Series

    Hello. I have a little confusing with some aspect related to the Peak Over Thresold Series and differencing the methodology of analysis from that...

    Started by Jpalbae‎, 08-06-2014 10:54 AM
    ploting positions, pot-series, probability
    • Replies: 0
    • Views: 71
    08-06-2014, 10:54 AM Go to last post
  11. Building confidence intervals using Coefficient of variation

    Hi I have a doubt and i need to understand it. At my work, my colleagues use the coefficient of variation for doing confidence intervals. Not...

    Started by jfca283‎, 08-05-2014 10:59 AM
    • Replies: 7
    • Views: 189
    08-05-2014, 12:51 PM Go to last post
  12. Probability Math Homework

    If someone could please help. I got the first part of question correct, but cannot figure out how to calculate the second part of the question. ...

    Started by emily8319‎, 07-31-2014 02:03 PM
    • Replies: 2
    • Views: 205
    08-01-2014, 10:47 AM Go to last post
  13. Interpretation histogram - normal versus logged variable

    For the histogram of my variable 'ambidexterity,' I predicted the data to have something like two normal distributions for this variable, one at the...

    Started by rob1‎, 07-31-2014 11:25 AM
    • Replies: 1
    • Views: 137
    07-31-2014, 11:49 AM Go to last post
  14. Looking for an elegant mathematical expression

    Hi to you all, i am new at this forum and i am glad there is such. Problem description suppose i am playing two seperate games (independently!)...

    Started by yaron‎, 07-30-2014 09:15 AM
    • Replies: 2
    • Views: 135
    07-31-2014, 02:46 AM Go to last post
  15. Can't justify 'correct' answer

    I thought I understood sampling without replacement fairly well, but this problem has me stumped as the answer that I calculate doesn't appear to be...

    Started by Brother Maynard‎, 07-27-2014 09:05 PM
    • Replies: 2
    • Views: 153
    07-29-2014, 07:29 PM Go to last post
  16. 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: 103
    07-29-2014, 06:51 AM Go to last post
  17. Question Logistic Regression Problem

    Hi! My collegue is developing a logistic regression to predict the probability of a customer taking up a particular credit card. Let's call...

    Started by rbenzoj‎, 07-22-2014 01:19 PM
    correlation, logistic regression
    • Replies: 5
    • Views: 299
    07-28-2014, 09:57 AM Go to last post
  18. Number serviceable at given time

    If I have 50 systems each operating 400 hours per year with an MTBF of 900 hours how do I calculate how many would be serviceable at one time?...

    Started by brif‎, 07-24-2014 07:46 AM
    • Replies: 12
    • Views: 270
    07-28-2014, 08:40 AM Go to last post
  19. Question about well-suited poker hand

    Hi, I have the following question: A peculiar deck of playing cards is like a regular deck, but has five suits: spades, hearts, diamonds, clubs,...

    Started by Turtles123‎, 07-24-2014 03:25 PM
    • Replies: 2
    • Views: 205
    07-27-2014, 09:26 AM Go to last post
  20. Probability of sequences having 1-4 distinct numbers

    This is more of combinations problem, but I need to count the number of ways in order to get the probabilities. I would like to find the number...

    Started by Schoolman‎, 07-25-2014 08:10 AM
    • Replies: 1
    • Views: 114
    07-27-2014, 02:43 AM Go to last post
  21. Stochastic Integral

    Hi there, I created an account here trying to get some help on my problem. I'm really desperate as I'm going to need this for my work on my...

    Started by JBrettas‎, 07-17-2014 10:37 PM
    • Replies: 4
    • Views: 284
    07-23-2014, 06:34 PM Go to last post
  22. Probability based on multiple pieces of information

    It's been about 20 year since my last stats class and I'm working on a fun little side project that involves some probability. I'm having some...

    Started by bobbytables‎, 07-20-2014 10:25 PM
    • Replies: 9
    • Views: 293
    07-22-2014, 12:57 PM Go to last post
  23. Normal and standard distribution question

    I have X \sim N(0,1) and Y \sim N(\mu,\sigma^2) Apparently then Y =\sigma X + \mu I can't quite see how, and can't find anything on the...

    Started by Prometheus‎, 05-25-2014 08:50 AM
    • Replies: 6
    • Views: 348
    07-21-2014, 11:47 AM Go to last post
  24. Group Assortment Measure

    Hi I need a formula that returns a value representative of the amount of ‘assortment’ a group shows. The groups are made up of individuals, all of a...

    Started by josh1‎, 07-19-2014 10:53 AM
    • Replies: 0
    • Views: 125
    07-19-2014, 10:53 AM Go to last post
  25. PDF of (nearly) collinear variables

    My question is motivated by a problem with estimation by maximum likelihood. In simple terms, I want to estimate a parameter \beta and have three...

    Started by Sam Vimes‎, 07-18-2014 07:25 AM
    collinearity, likelihood function, probability distribution
    • Replies: 1
    • Views: 165
    07-18-2014, 10:46 AM Go to last post
  26. Probability of a sequence....

    HI Folks, New to the forum. It's nice to find a forum in this area. I hope someone can help me out. My goal is to determine if it is possible to...

    Started by MikCss‎, 05-29-2014 07:44 AM
    • Replies: 5
    • Views: 396
    07-12-2014, 06:41 PM Go to last post
  27. Need some help with probability and dice

    Hi guys, I'm making a board game and ran into some probability problems with dice. I use custom dice (green, blue, red, and yellow). The same...

    Started by Tucker‎, 07-09-2014 05:16 PM
    • Replies: 3
    • Views: 237
    07-10-2014, 03:10 AM Go to last post
  28. Exam Question / need help

    3-Suppose that you are in charge of marketing airline seats for a major airline company. Four days before the flight you have 12 seats remaining on...

    Started by duffann‎, 06-25-2014 01:36 AM
    • Replies: 2
    • Views: 295
    07-09-2014, 03:15 PM Go to last post
  29. How do you calculate and relate odds from two different experiments?

    a) Lets say I have a sack with 119 white balls and 1 black one. Pw=119/120 almost 99.17 % b) A guy called John comes and pick randomly picks a...

    Started by bghiggeri‎, 07-08-2014 04:27 PM
    • Replies: 0
    • Views: 184
    07-08-2014, 04:27 PM Go to last post
  30. Uniform Distribution - probabilities

    Hi guys, I am trying to solve an exercise but it seems to bem somehow strange. It is an experiment where A believes that men are bigger than women...

    Started by mathstats‎, 07-08-2014 03:15 AM
    uniform distribution
    • Replies: 2
    • Views: 155
    07-08-2014, 09:01 AM Go to last post
  31. IP probability question

    hi guys. as you know, IP is a combination of 4 parts. every part is from 0-255, for example 234.32.135.7. now, my question is, what is the...

    Started by uv_h‎, 06-06-2014 09:48 AM
    probability
    • Replies: 6
    • Views: 401
    07-08-2014, 07:12 AM Go to last post
  32. Would love some assistance with understanding this puzzling probability "game"

    Hello everyone, This is my first post here, so please be gentle :). I'd like to thank everyone in advance for any help that can be given. ...

    Started by Habanero‎, 07-05-2014 12:25 AM
    • Replies: 3
    • Views: 299
    07-05-2014, 06:18 PM Go to last post
  33. Question Probit regression - Interpretation of marginal effects of IVs in log/percentage form

    Dear talkstats-community, I already spent hours on websearch for an answer on a question I have regarding the interpretation of marginal effects...

    Started by MSCBUS‎, 07-03-2014 06:54 AM
    marginal effects, marginal probability, probit regression
    • Replies: 1
    • Views: 214
    07-04-2014, 10:56 AM Go to last post
  34. What are the chances?

    Question: How many times must A occur in order for C to occur 3 times and D to occur once? Every time A occurs, there is a 1 in 2,500 chance that...

    Started by timmah507‎, 06-21-2014 02:33 PM
    • Replies: 1
    • Views: 252
    07-02-2014, 05:58 AM Go to last post
  35. Binomial distribution ! Need help!

    Hi, plz tell me if method to solve these question is correct or not! q)In a call centre 180 calls are received at random over a period of 12...

    Started by Shashank Prasad‎, 06-28-2014 11:05 AM
    • Replies: 0
    • Views: 165
    06-28-2014, 11:05 AM Go to last post
  36. Poisson distribution!! Need help

    Hi, Need help in solving few poisson distribution questions q)A dealer receives hard disks made by a certain manufacturer who on an average gives...

    Started by Shashank Prasad‎, 06-28-2014 10:59 AM
    • Replies: 0
    • Views: 95
    06-28-2014, 10:59 AM Go to last post
  37. 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: 231
    06-28-2014, 08:27 AM Go to last post
  38. Traffic light probability question.Need help!!

    Hi, Need help to solve this probability question. At a certain traffic signal red for 30 seconds, yellow for 5 seconds, and green for 25 seconds....

    Started by Shashank Prasad‎, 06-27-2014 04:22 PM
    • Replies: 0
    • Views: 82
    06-27-2014, 04:22 PM Go to last post
  39. Need help to solve Probability question!

    Hi, Need help to solve this probability question! A supplier of company X makes on average 5 defective pieces.The company accepts a sample if...

    Started by Shashank Prasad‎, 06-27-2014 04:14 PM
    • Replies: 0
    • Views: 80
    06-27-2014, 04:14 PM Go to last post
  40. Please help, need to find a book

    Dear friends, I need to find the textbook where the exercises on the photo (attached) come from. It's very urgent. Please help. Thank everybody.

    Started by East31‎, 06-25-2014 10:56 PM
    • Replies: 9
    • Views: 384
    06-26-2014, 10:26 PM Go to last post
  41. Simple Probability Question

    OK, so I am wondering about something and am not good with probability, but maybe someone here has the answer You have a die with only 4 sides,...

    Started by jp023‎, 06-25-2014 10:02 AM
    dice, math, probability, problem, question
    • Replies: 2
    • Views: 329
    06-25-2014, 11:03 AM Go to last post
  42. Poisson distribution, university exam quistion

    I have the following exam question witch I would appreciate some help with Question: In certain parts of a car one uses plastic plates. These...

    Started by Hytsky‎, 06-21-2014 03:47 PM
    • Replies: 1
    • Views: 300
    06-22-2014, 02:10 AM Go to last post
  43. Probability problem

    Ques- Suppose there are two bags A and B. A contains n white balls and 2 Black balls and B contains 2 white and n black balls. One of the two bags is...

    Started by MTE-11‎, 06-20-2014 08:48 AM
    • Replies: 1
    • Views: 215
    06-20-2014, 02:37 PM Go to last post
  44. Customer Retention Probability

    I'm not a statistician so forgive my ignorance. Here's what I'm trying to do: I have a list of all customers active and cancelled. I have tables...

    Started by stevedg‎, 06-18-2014 02:39 PM
    • Replies: 2
    • Views: 246
    06-19-2014, 01:27 AM Go to last post
  45. Homework help?

    Hi... So I'm taking statistics as an independent study this summer... Having troubles. I'm on my last question for the night. Can someone walk me...

    Started by AlmostdsntCount‎, 06-13-2014 10:59 PM
    • Replies: 6
    • Views: 359
    06-18-2014, 01:45 PM Go to last post
  46. Explanation counting principle problem

    If a travel agency o ers special weekend trips to 12 di erent cities, by air, rail, bus, or sea, in how many di erent ways can such a trip be...

    Started by davidchung2004‎, 06-17-2014 02:27 PM
    • Replies: 4
    • Views: 259
    06-18-2014, 12:50 AM Go to last post
  47. Which Probability Distribution Model to use?

    I have a data set in form of a csv file (attached with). This data set contains profiles of different candidates standing for election in a...

    Started by TanmayB‎, 06-13-2014 02:48 PM
    • Replies: 1
    • Views: 306
    06-13-2014, 05:15 PM Go to last post
  48. Probability of Winning

    Hi need some help to understand how the below probability can be determined If I pay $100 to play a game where if lose i lose the $100 but in case...

    Started by karthikgoel3‎, 06-11-2014 01:32 AM
    • Replies: 1
    • Views: 286
    06-11-2014, 01:56 AM Go to last post
  49. Soccer betting probability, risk and odds question - help

    Hello, Consider two different cases of soccer betting. 1) The first consists of 32 different sets of matches (each consisting of 5 matches with...

    Started by Ercello‎, 06-10-2014 08:36 AM
    betting, odds, probability, soccer
    • Replies: 0
    • Views: 218
    06-10-2014, 08:36 AM Go to last post
  50. Hypothesis testing : Help to formulate null hypothesis

    Hi all I'm currently doing a hypothesis testing to test a set of sample data (large sample size). From my knowledge of statistics, the null...

    Started by Corsa‎, 06-09-2014 01:32 AM
    • Replies: 3
    • Views: 289
    06-10-2014, 07:16 AM Go to last post
  51. Probability Help

    Hi, I giving my IGCSE this November and came across a problem that I can't solve. It'd be really helpful if someone can help me with the sum. ...

    Started by preziano‎, 06-09-2014 01:59 AM
    • Replies: 6
    • Views: 295
    06-09-2014, 04:30 AM Go to last post
  52. Help with interpreting data regarding religious Affiliation and aspirations to cheat

    An article is claiming that likelihood to cheat can be predicted by religious affiliation. I have provided some of their data on their sample of...

    Started by thecosmodreamer‎, 06-06-2014 11:30 PM
    probability, religion
    • Replies: 3
    • Views: 458
    06-07-2014, 09:34 PM Go to last post
  53. Probability of achieving an expected rate of return by targeting a constat VaR level

    Hi all, I am new to this website. Trying to infer the probability of achieving an expected annual rate of return say 10% (assuming my daily returns...

    Started by Kevpol‎, 06-04-2014 04:16 AM
    • Replies: 3
    • Views: 269
    06-07-2014, 03:12 PM Go to last post
  54. Prove that the SD of an asymmetric function is larger than the SD of a symmetric one

    How can I prove that the standard deviation of an asymmetric function (mean>median>mode) is larger than the standard deviation of a symmetric one...

    Started by Scrooge‎, 06-04-2014 12:52 PM
    • Replies: 8
    • Views: 313
    06-06-2014, 01:02 AM Go to last post
  55. Calculating two-tailed probability for Monte Carlo sampling distribution

    Hi, First off, I am new to this forum and would like to take this chance to say hi to everyone. I am currently working on a statistics project,...

    Started by samlin‎, 06-04-2014 02:43 PM
    • Replies: 0
    • Views: 302
    06-04-2014, 02:43 PM Go to last post
  56. Homework

    This particular problem has had me "stumped" for several hours. I need to turn in the assignment, however want to make sure my answer is correct. I...

    Started by tyson12‎, 06-04-2014 12:03 PM
    • Replies: 1
    • Views: 159
    06-04-2014, 12:15 PM Go to last post
  57. comparison with normal distribution truncated

    Hello, I would to know how to calculate the probability that X > Y when Y is greater than a given value p (X and Y are random variable following...

    Started by pascal34‎, 06-03-2014 10:49 AM
    gaussian distribution
    • Replies: 7
    • Views: 377
    06-04-2014, 06:53 AM Go to last post
  58. Negative binomial distribution

    Hello, I am a student at the university of Hasselt (Belgium) in management, and I had to follow a statistical course. It is for me very difficult...

    Started by bibifers‎, 06-02-2014 12:44 PM
    • Replies: 7
    • Views: 304
    06-02-2014, 05:16 PM Go to last post
  59. How to interprets this algorithm

    I make some algorithms to estimate the optimal values. and i want to model it algorithms using probabilistic theorem. but i dont know which...

    Started by gkyh0805‎, 06-02-2014 09:12 AM
    bayesian network, proability
    • Replies: 0
    • Views: 144
    06-02-2014, 09:12 AM Go to last post
  60. Bayes' Theorem applied to poker?

    please delete this post

    Started by coveby‎, 06-01-2014 05:46 AM
    poker bayes theorem
    • Replies: 1
    • Views: 234
    06-01-2014, 11:00 AM Go to last post

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