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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: 30,328
    09-30-2005, 09:44 AM Go to last post
  1. Coin Fliipping or Rats at Vertices

    I'm aware that if you play the coin flipping game where the winner is the first to get a head the player who goes first has a 2/3 chance of winning....

    Started by Banz‎, 04-01-2012 12:14 PM
    • Replies: 1
    • Views: 1,965
    04-01-2012, 02:01 PM Go to last post
  2. Question please help me out!

    I'm having problem with binomial and poisson distribution. please help me out.

    Started by bapex4real‎, 12-09-2005 09:21 AM
    • Replies: 1
    • Views: 2,462
    12-09-2005, 09:30 AM Go to last post
  3. Data probability/density

    Hi, hope im in the right place. Im trying to find the best way to characterize the different data on this space? to 3 draw regions (or lines with...

    Started by barakah‎, 05-01-2015 09:47 AM
    • Replies: 4
    • Views: 1,413
    05-01-2015, 03:45 PM Go to last post
  4. Statistics newb with poker questions

    Let's say I have a dozen variables for tens of thousands of players and I'm trying to figure out the formula using a symbolic regression program for...

    Started by barbiedoll‎, 02-02-2010 07:19 PM
    • Replies: 8
    • Views: 4,006
    02-03-2010, 04:59 PM Go to last post
  5. Distribution of the Sum of r.v.

    Guys, I will appreciate if you can give me some hints on this problem: Let X1,X2,...Xn be i.i.d with mass function f(k)= / for k>1. Find the...

    Started by Bardn‎, 10-31-2010 01:01 AM
    • Replies: 6
    • Views: 2,773
    10-31-2010, 12:00 PM Go to last post
  6. Do you recognize this distribution?

    I'm pondering the probabilities involved in playing a certain fantasy wargame. For the most part, this game works on a dice pool mechanic can be...

    Started by Bargle‎, 03-15-2010 11:17 PM
    • Replies: 0
    • Views: 2,050
    03-15-2010, 11:17 PM Go to last post
  7. Need some homework help. (work provided)

    Hey guys my current book I am using is statistics and the author is weiss just fyi. I am real confused about a concept. here is the question. ...

    Started by barnetod‎, 11-22-2006 03:49 AM
    • Replies: 1
    • Views: 2,738
    11-22-2006, 11:15 AM Go to last post
  8. Random Variable Probability HW Help.

    I am lost due to the fact that extra information was provided. An investor plans to invest $50,000 in one of four investments. The return on each...

    Started by barnetod‎, 12-04-2006 10:13 PM
    • Replies: 3
    • Views: 6,898
    12-07-2006, 07:54 AM Go to last post
  9. Probability Question from Frederick Mosteller, #7

    Hey all, I'm trying to improve my probability skills so hopefully the questions I'm asking aren't too amateur-ish. The following is a question...

    Started by barrelbowl‎, 09-25-2013 07:18 PM
    • Replies: 1
    • Views: 1,936
    09-27-2013, 01:01 PM Go to last post
  10. Understanding independent events.

    There is a problem I do not understand: Government data show that 8% of adults are full-time college students and that 30% of adults are age 55 or...

    Started by barryjo‎, Yesterday 08:58 AM
    • Replies: 1
    • Views: 130
    Yesterday, 09:02 AM Go to last post
  11. Mainly interested in knowing if a solution is even possible.

    P(A U B) = .7 P(A U compliment of B) = .9 Find P(A) I've racked my brain and cannot come up with an answer. This is all I've...

    Started by bartoncl‎, 09-15-2009 01:48 PM
    • Replies: 1
    • Views: 2,160
    09-16-2009, 09:01 AM Go to last post
  12. lottery probability

    got the answer already. thanks! :)

    Started by bartowski‎, 04-21-2012 12:02 PM
    lottery, probability
    • Replies: 1
    • Views: 1,896
    04-21-2012, 02:27 PM Go to last post
  13. probability question (re success)

    got the answer already. thanks! :)

    Started by bartowski‎, 04-21-2012 12:52 PM
    experiment, probability, success
    • Replies: 1
    • Views: 1,467
    04-21-2012, 02:31 PM Go to last post
  14. probability question

    The probability that an individual recovers from an illness in a one-week time period without treatment is 0.1. Suppose that 20 independent...

    Started by bartowski‎, 04-28-2012 09:39 AM
    • Replies: 1
    • Views: 4,198
    04-28-2012, 09:55 AM Go to last post
  15. probability question

    The number of cracks in a section of interstate highway that are significant enough to require repair is assumed to follow a Poisson distribution...

    Started by bartowski‎, 04-28-2012 07:52 AM
    poisson, probability
    • Replies: 2
    • Views: 3,003
    04-29-2012, 03:03 PM Go to last post
  16. poisson problem

    The number of cracks in a section of interstate highway that are significant enough to require repair is assumed to follow a Poisson distribution...

    Started by bartowski‎, 04-28-2012 07:54 AM
    poisson, probability
    • Replies: 1
    • Views: 2,228
    04-28-2012, 09:36 AM Go to last post
  17. Probability Question

    Hi Guys, I'm a novice at probability and would be very appreciative of some assistance with this question: If Company A (car manufacturer)...

    Started by Baseball Furies‎, 01-13-2011 06:01 PM
    • Replies: 5
    • Views: 3,944
    01-14-2011, 04:21 AM Go to last post
  18. 99% Confidence Interval

    Hi Guys, I'm stuck and need a little help on this one. I have calculated mean: 74.40 and Std Dev: 12.251 from Population 262, Sample 103. I...

    Started by Baseball Furies‎, 01-23-2011 04:40 PM
    • Replies: 3
    • Views: 5,518
    01-23-2011, 05:15 PM Go to last post
  19. Multivariate probability density and distance... help!!

    Hi all. I'm far from a stats connoisseur, and will probably use all the wrong words and describe my problem poorly. But I've got to figure it out...

    Started by bassganglia‎, 05-01-2012 11:58 AM
    distance, multivariate, probability density
    • Replies: 0
    • Views: 1,793
    05-01-2012, 11:58 AM Go to last post
  20. Computing probability density function

    If I know the probability distribution of two variables, say x and y, i.e. I know that P(x) and P(y) are both gaussian, how would I compute the P(R)...

    Started by bass_mouth‎, 06-28-2012 04:49 PM
    • Replies: 4
    • Views: 1,741
    07-01-2012, 11:17 PM Go to last post
  21. Matching Numbers from two baskets

    Hey guys, I would very much appreciate your help here, as I'm stuck with this problem since a couple of evenings now: I have an interval of...

    Started by bastainbrice‎, 10-23-2008 12:10 PM
    • Replies: 2
    • Views: 2,137
    10-24-2008, 02:28 AM Go to last post
  22. binary sequence statistics

    Hi all, I have a problem. Supose a random sequence: 011000101010101_? I want to find the probability of next number comes 0 or 1. So i want to...

    Started by Bat09‎, 11-15-2013 09:48 AM
    • Replies: 0
    • Views: 1,204
    11-15-2013, 09:48 AM Go to last post
  23. Probability of 4 of n shots hitting.

    Hello. First timer here, hopefully you guys can help me! First of all, let me say that this is not a homework problem of any sort, it's for a...

    Started by BAUSTIN‎, 10-26-2010 09:04 AM
    • Replies: 6
    • Views: 3,767
    10-26-2010, 01:18 PM Go to last post
  24. Problem with bayesian updating example

    Hi everybody, I have an example in bayesian statistics which I've worked on for some hours now, without significant success. The problem is the...

    Started by Bayesianski‎, 11-24-2010 09:57 AM
    • Replies: 2
    • Views: 4,414
    11-26-2010, 01:43 AM Go to last post
  25. Two events meeting

    Hello everyone, I have a question regarding two events that take place randomly over a certain time period and meet. A similar problem would be...

    Started by Bbehrouz‎, 09-23-2015 11:09 AM
    probability, probability theory, stochastic
    • Replies: 4
    • Views: 858
    09-23-2015, 12:36 PM Go to last post
  26. Introduction to Statistics question

    Hello All, I have a question on my study guide that says A random sample of 64 observations produced the following summary statistics: sample...

    Started by bbowler‎, 04-29-2007 03:26 PM
    • Replies: 1
    • Views: 3,868
    04-30-2007, 08:17 AM Go to last post
  27. Binomial Question

    Current medical studies indicate that 30% of the population will suffer from the flu each winter. A group of 12 people is randomly selected. a....

    Started by bbrown79‎, 12-02-2009 05:50 PM
    • Replies: 3
    • Views: 2,420
    12-02-2009, 08:08 PM Go to last post
  28. Estimating proportion

    A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six into a package. Twenty packages are inserted in a box...

    Started by bbrown79‎, 12-02-2009 09:43 PM
    • Replies: 0
    • Views: 4,361
    12-02-2009, 09:43 PM Go to last post
  29. Line Segment Probability

    Question: Divide the line segment into 3 parts by selecting 2 points at random from . Find the probability that the largest part is at least 2...

    Started by bcastillo‎, 10-25-2010 02:12 PM
    • Replies: 0
    • Views: 3,534
    10-25-2010, 02:12 PM Go to last post
  30. task about CTR

    Hi guys! I have a question: There is link on the main google page with CTR 1.5% (CTR is number of clicked visitors divided by number of all...

    Started by bchep‎, 04-19-2015 11:51 AM
    • Replies: 0
    • Views: 981
    04-19-2015, 11:51 AM Go to last post
  31. Multiple normal distributions

    Post removed.

    Started by bcs‎, 01-26-2007 07:04 PM
    • Replies: 0
    • Views: 2,775
    01-26-2007, 07:04 PM Go to last post
  32. estimating likelihood

    First off, this isn't homework question, just trying to figure it out. Imagine you have a box with a window. You make an observation through the...

    Started by beakerboy‎, 12-02-2011 04:01 PM
    • Replies: 2
    • Views: 2,691
    12-05-2011, 02:12 PM Go to last post
  33. Derived Random Variable

    Can someone please explain the idea behind this to me? My text says "Assume X is a random variable. Then we can define another r.v. Y = g(X). ...

    Started by beanus‎, 03-02-2012 07:19 PM
    • Replies: 2
    • Views: 3,529
    03-03-2012, 07:43 PM Go to last post
  34. Pascal Random Variable

    I've got a test coming up and I'm redoing all of my old homework to make sure I understand everything. I ran across this gem and really have no clue...

    Started by beanus‎, 03-03-2012 07:56 PM
    • Replies: 0
    • Views: 3,893
    03-03-2012, 07:56 PM Go to last post
  35. Calculating probability of multiple events

    This is my first post so I hope I can get my question across reasonably intelligently. I have calculated the probability of an event occurring for...

    Started by Bear47‎, 11-18-2008 10:12 AM
    • Replies: 3
    • Views: 13,440
    11-26-2008, 05:24 AM Go to last post
  36. Expected values of bivariate distribution

    Hi guy's, To calculate Eor E of a bivariate pdf fXY(xy) Do you treat them seperately ie to calculate E E= \int x f(x,y)dx or to calculate...

    Started by beatle‎, 05-09-2009 04:16 PM
    • Replies: 2
    • Views: 6,065
    05-10-2009, 03:58 PM Go to last post
  37. Stats help Please!!!!

    This problem is driving me crazy! The length of time to complete a door assembly on an automobile factory assembly line is normally distributed...

    Started by becca3848‎, 12-16-2005 06:55 PM
    • Replies: 7
    • Views: 17,754
    12-18-2005, 01:56 PM Go to last post
  38. Google Earth circles probability

    Hi everyone. Not sure if this is the right forum but I'll give it a go. Q: If you draw a circle on a sphere, what are the odds that a randomly...

    Started by BedrockGeometry‎, 05-07-2015 05:27 AM
    • Replies: 3
    • Views: 1,158
    05-07-2015, 08:58 AM Go to last post
  39. Exclamation Probability

    Let X1,,X25 be binomial random variables with identical parameters n=100 and p=0.3. Use the central limit theorem to calculate the probability that...

    Started by Beena‎, 06-21-2007 11:35 PM
    • Replies: 2
    • Views: 2,057
    06-21-2007, 11:47 PM Go to last post
  40. please help a stupid engineer

    Hi guys, I have a problem which should be pretty basic, but I cannot remember how to do it. There is a probability p that one water customer...

    Started by beezaur‎, 02-17-2006 10:20 PM
    • Replies: 9
    • Views: 3,251
    02-18-2006, 02:30 PM Go to last post
  41. Unhappy Conditional Probability - Exam

    Someone can help me please, I need to understand them for my exam on Monday in next week. Today is Saturday.....Thanks a lot..... USING AND...

    Started by begacon‎, 07-28-2007 07:10 PM
    • Replies: 2
    • Views: 29,997
    07-13-2016, 01:00 AM Go to last post
  42. Normal Distribution Question

    Hi, Can someone please help? Product A has mean of 2980 and std dev of 500. Product B has mean of 3000 and std dev of 800. Both are normally...

    Started by BeginnerStats‎, 10-20-2007 06:17 PM
    • Replies: 0
    • Views: 2,608
    10-20-2007, 06:17 PM Go to last post
  43. Question regarding Z Scale - Is my answer correct?

    Here is the question. A company markets salmon in cans. It claims that the net mean weight of the cans is 8 and the standard deviation is .04. ...

    Started by bej0520‎, 10-12-2010 08:43 AM
    • Replies: 2
    • Views: 4,148
    10-12-2010, 09:41 AM Go to last post
  44. Probability Homework problem

    My 7-grade daughter brought this problem home today and having trouble figuring it out. Each box contains a pen with one of four colors, equally...

    Started by bekmonster‎, 01-19-2017 10:41 PM
    conditional probability
    • Replies: 3
    • Views: 3,128
    01-22-2017, 02:49 PM Go to last post
  45. Joint distribution of noncentral t statistics

    Hi, I need to compute a probability which is described by the joint distibution of 2 non-central t statistics. If somemody knows references...

    Started by Bel Duarte‎, 08-28-2008 08:56 AM
    • Replies: 4
    • Views: 2,470
    09-03-2008, 10:30 AM Go to last post
  46. Probability Question

    Problem I'm working on. Mean-242.2; Standard deviation =45.4; Using a normal probability distribution function I have calculated various...

    Started by bella‎, 06-28-2006 05:15 PM
    • Replies: 0
    • Views: 2,082
    06-28-2006, 05:15 PM Go to last post
  47. Question Statistics Research Process - Please help

    :confused: Hello Stat-helpers, I am currently taking a Statistics course online, which I am learning solo and need your assistance. I am a quick...

    Started by Bella Love‎, 12-27-2009 05:06 AM
    • Replies: 0
    • Views: 7,086
    12-27-2009, 05:06 AM Go to last post
  48. Kernel density estimation for non-I.I.D. data

    Hi - This is my first post here, so let me know if I'm out of order in any way. I am wondering if Kernel Density Estimation (KDE) is appropriate...

    Started by belliott4488‎, 12-11-2009 01:34 PM
    • Replies: 0
    • Views: 3,256
    12-11-2009, 01:34 PM Go to last post
  49. Weighted multivariate hypergeometric distribution?

    Hi, I'm writing a simulation where part of it can be done using the following steps: 1. Choose 1 element from with probability without...

    Started by Ben1979‎, 11-25-2011 10:40 AM
    • Replies: 4
    • Views: 3,215
    11-28-2011, 07:05 PM Go to last post
  50. Dice probability problem

    Hi everyone, I have a simple dice problem but am having trouble with it because it's hard to google something like this. Here it is... I have...

    Started by benali‎, 12-15-2014 07:39 PM
    • Replies: 2
    • Views: 1,640
    12-16-2014, 08:56 AM Go to last post
  51. Binomial Test in Excel

    What is the probability of getting AT LEAST 79 out of 90 correct on a True or False test if you are guessing on every question? I think I need to...

    Started by bengalgirl‎, 12-06-2014 04:46 PM
    binomial distribution, excel
    • Replies: 0
    • Views: 2,322
    12-06-2014, 04:46 PM Go to last post
  52. Linear combination of empirical distributions for independent rvs

    Hi there, I have n independent rvs: X1, ..., Xn. I have obtained the empirical distribution functions F1, ..., Fn for each of the rv. Is it...

    Started by beninti‎, 10-01-2008 12:13 PM
    • Replies: 0
    • Views: 2,644
    10-01-2008, 12:13 PM Go to last post
  53. HELP: Creating an ordered list of objects; independent/dependent events

    Let us say that I have an ordered list of objects (numbered balls). From this list of N balls, I am going to choose seven of them and place them...

    Started by Benjamin Durbin‎, 02-11-2013 07:19 PM
    • Replies: 0
    • Views: 1,013
    02-11-2013, 07:19 PM Go to last post
  54. Probability Function Help

    During my college days, I used my statistics classes to help me understand the probabilities of various roleplaying games, including Vampire, the...

    Started by BenjCano‎, 12-22-2015 11:29 AM
    • Replies: 0
    • Views: 1,117
    12-22-2015, 11:29 AM Go to last post
  55. Need help on probability calculations

    Hi folks, I have to solve some problems with probability exercises and need helpt to understand how to find the right solution. Here it comes:...

    Started by bennemsi‎, 06-14-2011 03:16 AM
    • Replies: 1
    • Views: 1,588
    06-14-2011, 12:49 PM Go to last post
  56. Probability Problem

    This isn't for homework this is for my personal curiosity. Here's the problem. You pick 5 colors at random from a bag with an infinite amount of...

    Started by Benny‎, 12-12-2012 10:20 PM
    • Replies: 3
    • Views: 2,386
    12-14-2012, 12:33 AM Go to last post
  57. Game Theory Question

    Hello gurus, I got involved in a debate with my sister this evening, and despite (what I thought) was a relatively simple problem, I couldn't...

    Started by BennyH26‎, 09-17-2012 09:18 PM
    game theory, independent events, odds, probability
    • Replies: 2
    • Views: 1,634
    09-17-2012, 10:37 PM Go to last post
  58. how do u work out this problem?

    Hi There, there is one problem that is killing me. I will appreciate any help. From what Ive learnt so far it relates to Binomial distribution. ...

    Started by bennym‎, 10-24-2010 10:37 AM
    • Replies: 1
    • Views: 4,030
    10-24-2010, 11:12 AM Go to last post
  59. Counting question

    Hey, I am not able to find the number of combination when I have 100 varaibles... with 2, I have: AB: A - B - AB = 3 combinations with 3, I...

    Started by Benoit I‎, 06-04-2008 07:35 PM
    • Replies: 2
    • Views: 3,215
    06-04-2008, 08:53 PM Go to last post
  60. 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: 1,038
    01-28-2016, 07:02 AM Go to last post

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