1. 10-14-2010
    Views:
    20,006
+ Post New Thread
Page 1 of 82 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... LastLast
Threads 1 to 60 of 4908

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: 12,149
    09-30-2005, 09:44 AM Go to last post
  1. Immortality & Bayesian Statistics

    - I seem to have written an 8 page paper virtually proving -- through Bayesian statistics -- that we are immortal (or something similar). Obviously,...

    Started by Jabba‎, 03-16-2015 10:12 AM
    4 Pages
    1 2 3 ... 4
    • Replies: 50
    • Views: 1,267
    Yesterday, 04:42 PM Go to last post
  2. Multiple-testing correction in Moderation analyses

    Hi Everyone! In an exploratory attempt, I ran 35 moderation analyses (both 2-way and 3-way interactions) of which 7 were significant. NOw the...

    Started by rsfrzh‎, 03-27-2015 12:25 PM
    alpha, bonferroni correction, moderation, multiple testing
    • Replies: 0
    • Views: 63
    03-27-2015, 12:25 PM Go to last post
  3. Combining two normal distrubtions, 1 of which is for a project which may not happen

    Hello, I have to 2 projects: Project A: Median: $450k, Variance: 625 Project B: Median: $750k, Variance: 1250 Combined Freqency Distribution:...

    Started by mr e guest‎, 03-27-2015 10:55 AM
    • Replies: 0
    • Views: 52
    03-27-2015, 10:55 AM Go to last post
  4. Roulette probability question

    Hello I have a basic but quite difficult question about roulette probabilities (assuming roulette has 37 numbers 0-36). I need a general formula for...

    Started by Kav‎, 02-19-2015 11:49 AM
    • Replies: 4
    • Views: 105
    03-25-2015, 05:16 PM Go to last post
  5. Practical Birthday-Month probabilities

    Hello, I have a practical question that arose in a company gathering last week and as a biologist with very little statistic background I am looking...

    Started by apponi‎, 03-23-2015 01:00 PM
    • Replies: 3
    • Views: 136
    03-23-2015, 04:37 PM Go to last post
  6. Undergrads Probablity

    Hi, Am I understand the students' score order correctly? On a psychology exam with m = 76 and = 12, Tom scored 8 points below the mean, Mary had a...

    Started by iza‎, 03-21-2015 04:21 PM
    • Replies: 2
    • Views: 208
    03-21-2015, 06:38 PM Go to last post
  7. Question Thumbs Up or Down on my logic

    Very rusty on my statistics and will appreciate validation or correction on my thinking. "Fair" playing field - 88 players (18 in red shirts, 70...

    Started by hAltonJones‎, 03-21-2015 12:12 PM
    basic probability, newbie, probability
    • Replies: 5
    • Views: 158
    03-21-2015, 02:30 PM Go to last post
  8. One problem - two approaches, two different answers

    A test is based upon the average of 5 results. Assuming only random errors in measurement, what is the probability the data is trended (sequential...

    Started by BoSachok‎, 03-20-2015 12:52 PM
    • Replies: 0
    • Views: 148
    03-20-2015, 12:52 PM Go to last post
  9. Probability problem

    I am stuck, kindly help. There are two men V1 and V2. Each man has two buckets A and B. Bucket A contains numbered blocks from 7 to 14. Bucket B...

    Started by aliraja‎, 03-20-2015 06:30 AM
    • Replies: 3
    • Views: 141
    03-20-2015, 08:33 AM Go to last post
  10. Simple probability question

    Hi everybody, I have a really simple question to ask. Let us suppose to have a box with a button. This box contains an unknown number of white...

    Started by Laggio Conda‎, 03-19-2015 08:06 AM
    • Replies: 1
    • Views: 113
    03-19-2015, 08:20 AM Go to last post
  11. Bayesian and Probability

    A certain disease has infected 2% of the population. The firm has annoucned that 90% of those infected will show a postive test result , while 95% of...

    Started by xenovia‎, 03-17-2015 07:26 PM
    • Replies: 14
    • Views: 302
    03-18-2015, 03:39 PM Go to last post
  12. Question Having a pdf V and then defining a new one as W=V+1 & range of values

    The question goes as follows, there's a function V that equals 0.5 for -1<v<=1 and 0 otherwise. From this we define a new function W that is defined...

    Started by UsernamesAreUseless‎, 03-18-2015 07:37 AM
    • Replies: 1
    • Views: 96
    03-18-2015, 07:58 AM Go to last post
  13. Help solving probability scenario

    I play in a pool league and 4 of my teammates and I were busy practicing when we happened across an interesting scenario: Between 5 of us we...

    Started by FordLaz‎, 03-13-2015 11:11 AM
    • Replies: 12
    • Views: 356
    03-17-2015, 06:29 AM Go to last post
  14. Question about a Bernoulli experiment.

    Hi everyone. I have a problem on my mind as well as a solution for it, but I want to check if there are some other ways of solving it. So, let's...

    Started by eagleking95‎, 03-14-2015 01:14 PM
    • Replies: 2
    • Views: 207
    03-14-2015, 04:33 PM Go to last post
  15. Simulate and sample from a group

    I'm confused with a question as follows: Consider the case that the total number of accidents happening in a highway in one day follows the...

    Started by Bojo‎, 03-14-2015 05:48 AM
    • Replies: 0
    • Views: 126
    03-14-2015, 05:48 AM Go to last post
  16. get a distribution of x from y

    Hello I have two variables x and y with a roughly linear relationship and good correlation. I have been given a y value and I want to get a...

    Started by andyspeak‎, 03-13-2015 12:43 PM
    • Replies: 0
    • Views: 113
    03-13-2015, 12:43 PM Go to last post
  17. Random Variable of two other random variables. Confusion to the max!

    Here is the question at hand: I don't even know how to begin this question. I'm not looking for a complete solution per se but I don't even know...

    Started by Not a Statistician‎, 03-12-2015 06:38 PM
    binomial distribution, pmf, probability, random variables
    • Replies: 1
    • Views: 230
    03-13-2015, 03:14 AM Go to last post
  18. Probability dilemma?

    Hey everybody.. So my friend and I (high school seniors) had a bit of a disagreement. To get to the point, my contention is that, the more...

    Started by User-name‎, 03-11-2015 06:31 PM
    • Replies: 3
    • Views: 250
    03-11-2015, 10:35 PM Go to last post
  19. Exclamation Which method to solve...

    I just need direction...which method do I use to solve these two problems... 1) 2011 NYC had such and such number of accidents between Mon-Fri,...

    Started by newmommy‎, 03-10-2015 10:52 PM
    • Replies: 1
    • Views: 158
    03-11-2015, 07:48 AM Go to last post
  20. [ASK] Combination?

    5. A bag contains 7 red marbles and 5 yellow marbles. From the bag, 3 marbles are taken randomly at once. How many ways exist if all 3 taken marbles...

    Started by Monox D. I-Fly‎, 03-10-2015 09:56 PM
    • Replies: 0
    • Views: 97
    03-10-2015, 09:56 PM Go to last post
  21. Question Counting question

    4 selections of single digits are made at random with replacement, from the 10 digits 0-9. Find the probability that these sum to 20. I thought...

    Started by MathJack‎, 03-09-2015 04:44 PM
    • Replies: 1
    • Views: 274
    03-10-2015, 02:24 AM Go to last post
  22. Post Distribution of Sample Mean Question

    Hi, I have a bit of a problem with constructing a sampling distribution of the mean. The question itself is relatively simple: A population...

    Started by Bill_McCoy‎, 03-07-2015 03:40 AM
    • Replies: 1
    • Views: 215
    03-07-2015, 05:23 AM Go to last post
  23. Determine distribution given moment generating function

    I am given two moment generating functions, and need to calculate some probabilities regarding them. The first is: M(t) = ((2/3)e^t + (1/3))^3 ...

    Started by Lanuk‎, 03-05-2015 11:44 PM
    • Replies: 1
    • Views: 210
    03-06-2015, 01:49 AM Go to last post
  24. Red face Probability help

    never mind, solved it

    Started by youngmusashi‎, 03-05-2015 04:25 PM
    help me!, probability
    • Replies: 0
    • Views: 174
    03-05-2015, 04:25 PM Go to last post
  25. Post Binomial Distribution Question

    Hey guys, I have a bit of trouble understanding this binomial distribution question According to the call center statistics of a company, on...

    Started by Bill_McCoy‎, 03-05-2015 04:27 AM
    • Replies: 5
    • Views: 214
    03-05-2015, 09:43 AM Go to last post
  26. Probability help for a beginner

    Hi all, I've spent a long time analysing football (soccer) matches to rate teams and try and work out probabilities of various teams winning. ...

    Started by Fortesque‎, 03-02-2015 02:22 PM
    • Replies: 0
    • Views: 191
    03-02-2015, 02:22 PM Go to last post
  27. Game probability query

    I'm trying to develop a game idea - a kind of passport bingo. 200 people each have passports. Each passport has a 9 digit number. If I read out a...

    Started by davidehc‎, 02-27-2015 06:05 AM
    • Replies: 0
    • Views: 207
    02-27-2015, 06:05 AM Go to last post
  28. Question Poisson Distribution with two different expected value

    Question: Suppose there are number of accidents at location A and location B each day with Poisson Distribution with rate 0.001 and the number of...

    Started by Asano‎, 02-25-2015 11:03 AM
    mixed distribution, poisson distribution, probability, statistics
    • Replies: 2
    • Views: 350
    02-26-2015, 06:38 AM Go to last post
  29. Second Order Stochastic Dominance

    how can I test for second order stochastic dominance? is easy to understand the idea but when I have to normal distributions with different means and...

    Started by santicanel‎, 02-25-2013 08:02 PM
    • Replies: 2
    • Views: 955
    02-25-2015, 02:42 PM Go to last post
  30. Question Mixed Poisson Distribution Help

    Question: The number of accidents follows a Poisson distribution with mean 12. Each accident generates 1, 2 or 3 claimants with probabilities...

    Started by Asano‎, 02-25-2015 10:56 AM
    actuarial, homework help, probability, statistics
    • Replies: 1
    • Views: 172
    02-25-2015, 01:12 PM Go to last post
  31. Statistics HEEELLPPP!!

    A lot of 1000 components contains 250 that are defective. Two components are drawn at random and tested. Let A be the event that the first component...

    Started by Kcgiggles‎, 02-24-2015 09:02 PM
    • Replies: 1
    • Views: 232
    02-24-2015, 10:14 PM Go to last post
  32. Question Symbol for Mean of Probability Distribution

    “mu” is the symbol for the mean of a population, “x-bar” is the symbol for the mean of a sample, and “mu of x-bar” is the symbol for the mean of the...

    Started by DrAnthonyRodriguez‎, 02-24-2015 09:10 AM
    • Replies: 1
    • Views: 182
    02-24-2015, 10:48 AM Go to last post
  33. Help! HW: Family with 6 children, gender and birth

    Problem 2.1.5 from Basic Concepts of Probability and Statistics, 2nd Ed. by Hodges and Lehmann Suppose you know that a family has 6 children, 2...

    Started by yl2j‎, 02-22-2015 01:32 PM
    • Replies: 0
    • Views: 214
    02-22-2015, 01:32 PM Go to last post
  34. Trying to handicap the outcome of a race based on given probabilities

    Hello everyone. The past year or so I've been generating projection models for various sports to predict the performance of individual players....

    Started by huitcinq‎, 02-20-2015 04:22 PM
    distribution probability, probabilities, sports
    • Replies: 0
    • Views: 205
    02-20-2015, 04:22 PM Go to last post
  35. 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 11:50 AM
    • Replies: 1
    • Views: 248
    02-20-2015, 12:04 PM Go to last post
  36. Normal Distribution times constant

    I can't seem to find anything about this on the web. If I have a random variable distributed Normally: x ~ Normal(mean,variance) is the...

    Started by BigBugBuzzz‎, 09-30-2012 09:45 AM
    normal distribution
    • Replies: 4
    • Views: 10,280
    02-18-2015, 08:45 PM Go to last post
  37. Question Questions about the CLT

    The Central Limit Theorem (CLT) involves taking repeated samples of size n from a population. That is, the process involves two things: the number...

    Started by DrAnthonyRodriguez‎, 02-18-2015 09:20 AM
    clt
    • Replies: 1
    • Views: 209
    02-18-2015, 10:11 AM Go to last post
  38. D&D GM Needs Help Calculating Stat-Upgrades

    Hello! I've never taken a stat class, so bear with me if this seems basic. I have searched for a while for a solution to this, but nothing has been...

    Started by Marshmeloo‎, 02-17-2015 04:43 AM
    • Replies: 3
    • Views: 291
    02-17-2015, 11:45 PM Go to last post
  39. [ASK] Combination: Am I Doing This Right?

    Among 10 candidates of Students Council members, 3 people will be selected to undergo training. The number of possible ways to do so if 1 candidate...

    Started by Monox D. I-Fly‎, 02-14-2015 01:01 AM
    • Replies: 2
    • Views: 250
    02-17-2015, 09:06 PM Go to last post
  40. Unhappy Probability Question - Express in terms of P

    Hi, I am currently stuck on a probabilities question and I was wondering if anyone could help me a bit. A and B are two events. Suppose that ...

    Started by Bill_McCoy‎, 02-16-2015 07:07 AM
    express in terms of p, independent, probabilities
    • Replies: 1
    • Views: 206
    02-17-2015, 03:51 PM Go to last post
  41. Probablility question

    If the odds of winning a game are 1 in 10 what are the odds of winning that game three times in a row? Thanks for your help!

    Started by amynkaya@yahoo.com‎, 02-16-2015 11:45 AM
    • Replies: 0
    • Views: 179
    02-16-2015, 11:45 AM Go to last post
  42. Probability question

    For the 1st part of the question do I use Baye's Theorem? e.g. Required probability = 0.25*0.35/= 0.30 - using Baye's Theorem And can anyone...

    Started by tvtokyo‎, 02-16-2015 06:56 AM
    probability
    • Replies: 0
    • Views: 197
    02-16-2015, 06:56 AM Go to last post
  43. Basketball shooting percentage - binomial distribution?

    I am interested in studying the probability of team field goal percentage being unusually high. In context, I recently watched a women's college...

    Started by DRMORRIS‎, 02-14-2015 12:59 PM
    • Replies: 3
    • Views: 284
    02-15-2015, 10:59 AM Go to last post
  44. Negativ Binomial distribution

    I am trying to count number of occurrence for variable X. I have considered X as Poisson distributed since this sounds like a Poisson process. But...

    Started by Alfa‎, 02-14-2015 01:57 AM
    • Replies: 2
    • Views: 262
    02-15-2015, 05:15 AM Go to last post
  45. Question Type of Discrete Distribution

    What type of discrete probability distribution is the probabilities of the sum of the outcomes of an infinite number of dice rolls? The probabilities...

    Started by DrAnthonyRodriguez‎, 02-14-2015 04:59 PM
    probability distributions
    • Replies: 2
    • Views: 242
    02-15-2015, 05:05 AM Go to last post
  46. difference of two independent Poisson random variables

    Why the difference of two independent Poisson random variables doesn't have Poisson distribution? Demonstrate it.

    Started by LIPI‎, 02-10-2015 06:57 PM
    • Replies: 6
    • Views: 265
    02-13-2015, 10:50 AM Go to last post
  47. 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 05:11 PM
    • Replies: 6
    • Views: 312
    02-12-2015, 12:37 PM Go to last post
  48. 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 02:11 PM
    • Replies: 2
    • Views: 223
    02-11-2015, 10:42 PM Go to last post
  49. Combinations question

    I have a strange question I hope someone can explain it to me or tell me if there is some type of statistical definition for this process im trying...

    Started by ilikepeas‎, 02-09-2015 11:29 PM
    • Replies: 6
    • Views: 301
    02-10-2015, 09:09 PM Go to last post
  50. Error in Mosteller book? Problem 37

    I have been reading this book since I was 13. Time to time I open it and solve one or two problems (if I can). Especially I like problem #37 about a...

    Started by vasyok‎, 02-08-2015 07:48 PM
    • Replies: 4
    • Views: 292
    02-09-2015, 04:14 PM Go to last post
  51. Probability of Sporting Event Occurring

    Hello everyone I am trying to establish whether it is possible (or appropriate) to calculate the probability of a sporting event occurring given...

    Started by Regal88‎, 02-09-2015 01:29 PM
    bayes thoerem, football, outcomes, probability, soccer
    • Replies: 0
    • Views: 201
    02-09-2015, 01:29 PM Go to last post
  52. Var(X+Y+Z)

    What is the formula for the variance of 3 dependent variables? For 2 dependent variables, the formula is Var(X)+Var(Y)+2*Cov(X,Y) What is...

    Started by shrek‎, 07-08-2008 02:20 PM
    • Replies: 6
    • Views: 32,947
    02-09-2015, 01:15 AM Go to last post
  53. I need a lot of help!

    Hi guys. I have some questions and I will really appreciate your help! <3 1. (c) “Whenever possible, open-ended classes should be avoided.”...

    Started by plaide‎, 02-08-2015 12:47 AM
    • Replies: 0
    • Views: 255
    02-08-2015, 12:47 AM Go to last post
  54. Combinatorial Analysis HW Help

    There are 100 U.S Senators, two from each of the 50 States. If 12 Senators are randomly chosen to form a committee, what is the probabilty that...

    Started by blackhaze5‎, 02-07-2015 11:36 PM
    combinations, combinatorics, probability
    • Replies: 0
    • Views: 154
    02-07-2015, 11:36 PM Go to last post
  55. Golf Scores

    Yesterday my buddy and I both shot 84, 12 over par. But although we had the same gross scores we noticed that we did not tie any single hole. ...

    Started by Jonart‎, 02-07-2015 10:46 AM
    • Replies: 0
    • Views: 194
    02-07-2015, 10:46 AM Go to last post
  56. Probability

    A hiker is lost in a cave, and he wants to get out of the cave. Three passages are open to her. The first passage leads to the outside after 1 hour...

    Started by random_J‎, 02-06-2015 01:30 AM
    • Replies: 3
    • Views: 239
    02-06-2015, 12:06 PM Go to last post
  57. I need your help!

    (a) Bottle 1 consists of 4 red balls and 6 blue balls. Bottle 2 consists of some unknown number of red balls and 12 blue balls. One ball is drawn...

    Started by plaide‎, 02-06-2015 06:52 AM
    • Replies: 1
    • Views: 191
    02-06-2015, 07:11 AM Go to last post
  58. Question Stuck with a (i think) simple problem

    Hi everybody, I have a question here that I'm completely brain frozen with.. (I'm not the youngest anymore, and I can't seem to wrap my brain around...

    Started by derBrain‎, 02-04-2015 03:31 PM
    • Replies: 5
    • Views: 324
    02-05-2015, 12:39 PM Go to last post
  59. Probability of Failure of components...

    Hi there, My question is pretty simple, but I think I am going about the wrong way. An aircraft part has a .40 probability of being...

    Started by ChinookDriver47‎, 02-04-2015 08:21 PM
    • Replies: 1
    • Views: 198
    02-04-2015, 11:40 PM Go to last post
  60. Question Calculating Sensitivity and Specificity of Combined Testing...With a Surprise.

    Ok guys. I have an interesting question. I'm a biomedical engineering student from Georgia Tech and for one of my classes I have to implement...

    Started by ErikSampayo‎, 01-27-2015 12:49 PM
    conditional testing, rescreening, screening, sensitivity, specificity
    • Replies: 5
    • Views: 454
    02-03-2015, 08:35 AM Go to last post

+ Post New Thread
Page 1 of 82 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... LastLast

Thread Display Options

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats