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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: 30,288
    09-30-2005, 09:44 AM Go to last post
  1. Coin flipping

    A coin is weighted so chances of heads is 0.60 and the chances of tails is 0.40. The coin's tossed six times and the the number of heads out of six...

    Started by StatsH‎, 06-01-2008 08:03 PM
    • Replies: 1
    • Views: 3,242
    06-02-2008, 03:11 AM Go to last post
  2. coin toss

    I have a coin that lands heads with probability p1; you have a coin that lands heads with probability p2. I toss my coin until I get a head. Each...

    Started by meena‎, 02-23-2012 06:39 AM
    coin toss probability
    • Replies: 8
    • Views: 3,442
    02-26-2012, 05:35 AM Go to last post
  3. Coin Toss

    Hi, There are three people, A, B ,C, tossing a coin. The first one to get heads wins, they toss in succession in the order ABC, show the...

    Started by plm‎, 11-17-2013 10:06 AM
    • Replies: 5
    • Views: 2,322
    11-17-2013, 11:54 AM Go to last post
  4. Coin toss question

    How about a hint about how to approach the following problem. If you toss a fair coin X number of times, what would be the probability that the...

    Started by Mike H.‎, 09-21-2011 07:35 AM
    • Replies: 10
    • Views: 3,448
    09-28-2011, 03:45 PM Go to last post
  5. Collect answers and determine probability

    Hello! I'm trying to figure out a method to predict the most probable answer taking into account previous answers collected in a database. ...

    Started by alfred‎, 03-22-2012 12:10 PM
    prediction, probability
    • Replies: 0
    • Views: 1,302
    03-22-2012, 12:10 PM Go to last post
  6. collect sales taxes on items purchased through the internet

    Many states are carefully considering steps that would help them collect sales taxes on items purchased through the internet. How many randomly...

    Started by BMarks‎, 12-06-2007 03:58 PM
    • Replies: 0
    • Views: 5,424
    12-06-2007, 03:58 PM Go to last post
  7. College Football Bowl Pick'em Pool Probability

    I'm creating an excel spreadsheet for our office pool. If you're not familiar with the College Bowl Pick'em game, the rules are as follows... ...

    Started by klb311‎, 11-20-2015 02:01 PM
    • Replies: 2
    • Views: 2,519
    11-21-2015, 10:47 AM Go to last post
  8. College Smokers

    This is a proportion of a sampling distribution from what I can tell: I have thought and thought on how to finish this problem. I have read my...

    Started by racapozzi‎, 09-07-2013 01:49 AM
    • Replies: 2
    • Views: 2,044
    09-07-2013, 02:05 AM Go to last post
  9. colored balls probability..Please read

    Dear All Please give your attention to following and help. There are white(9/16) and black(7/16) balls in box with probabilities...

    Started by Telet Ted‎, 08-02-2012 03:09 AM
    • Replies: 2
    • Views: 1,795
    08-02-2012, 08:05 AM Go to last post
  10. Combination and Permutation question

    Hi guys, I'm new to the field of probability and statistics, I have a question that I can't seem to be able to solve, it would be a great help if you...

    Started by devick‎, 11-16-2014 07:57 AM
    • Replies: 2
    • Views: 1,457
    11-20-2014, 11:03 PM Go to last post
  11. Combination of families of fragility curves (cumulative probability functions)

    Hi guys, I am a geotechnical engineer and currently involved in a project for risk calculation of an embankment dam. It's my first post here, I am...

    Started by sandreev‎, 05-11-2015 09:42 AM
    conditional probability, engineering, fragilities, uni-modal limits theorem
    • Replies: 0
    • Views: 1,568
    05-11-2015, 09:42 AM Go to last post
  12. Combination or Permutation

    Please see the attached file. I obtained the answer by writing down the outcome sets. I wondered if they were correct. May I ask, how do we compute...

    Started by dEconomist‎, 12-29-2011 12:41 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 4,643
    12-31-2011, 08:56 AM Go to last post
  13. Combination permutation

    Suppose that from a class of students (of whom 14 are male and 16 are female), a committee of 10 students is chosen at random. The committee then...

    Started by DeerPark‎, 12-08-2010 11:23 AM
    • Replies: 0
    • Views: 3,276
    12-08-2010, 11:23 AM Go to last post
  14. Combination probability of variables that are not independent

    Hello, I'm hoping I might be able to get some help in creating a forecasting model (in sports) looking at 2 variables that are not independent of...

    Started by iambasil‎, 03-02-2013 08:39 PM
    • Replies: 0
    • Views: 1,205
    03-02-2013, 08:39 PM Go to last post
  15. Combination Problem

    I've been banging away at this... and I think I'm close, but would really appreciate someone looking over my shoulder... here goes: - 13 students...

    Started by skeptiko‎, 12-30-2008 12:17 PM
    • Replies: 0
    • Views: 2,131
    12-30-2008, 12:17 PM Go to last post
  16. Combination question

    Hey, kind of stumped on this and hopefully someone can point me in the right direction. A company is looking at events over N years. A person can...

    Started by wizuriel‎, 01-24-2013 12:40 PM
    • Replies: 1
    • Views: 1,694
    01-24-2013, 01:06 PM Go to last post
  17. Combination question...

    A combination lock has a total of 4 rows of numbers(0-9) and will unlock with the proper 3 - number sequence. How many possible combinations exist?...

    Started by neone4fun‎, 03-19-2006 05:14 PM
    • Replies: 1
    • Views: 2,510
    03-20-2006, 11:44 AM Go to last post
  18. Combination/Permutation (Password)

    -Resolved- Thanks

    Started by Niax‎, 07-07-2012 07:04 PM
    • Replies: 1
    • Views: 1,632
    07-07-2012, 07:07 PM Go to last post
  19. Combination/Permutation???

    Ok here is the problem I have four m$ms and three friends How many ways can i divide the m&ms considering i can give each friend 0, 1, 2, 3 or...

    Started by gobulldogs‎, 11-12-2007 07:22 PM
    • Replies: 1
    • Views: 4,253
    11-15-2007, 10:15 PM Go to last post
  20. Combinational problem

    This homework problem has me stumped. I have a pretty logical result b/c I think I use all of the 5 credits needed. The problem states, A video...

    Started by madenew‎, 01-29-2013 02:09 AM
    • Replies: 3
    • Views: 1,933
    02-01-2013, 12:39 AM Go to last post
  21. combinations and permutations

    hi all, can you all help me wif this question? 1. an art collector, who owns 10 paintings, is preparing her will. how many different ways can...

    Started by shangian_ng‎, 10-11-2009 05:12 AM
    • Replies: 3
    • Views: 3,347
    10-13-2009, 12:28 PM Go to last post
  22. combinations question

    At a recent faculty party there were 8 philosophers, 5 psychologists, and 6 physicists, all noted for their love of the (fermented) grape (and...

    Started by moe6142‎, 12-11-2012 10:17 PM
    • Replies: 1
    • Views: 1,422
    12-12-2012, 03:47 AM Go to last post
  23. 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, 02-10-2015 12:29 AM
    • Replies: 6
    • Views: 1,625
    02-10-2015, 10:09 PM Go to last post
  24. combinations/permutations

    It's for Finite Math and we're dealing with combinations, permutations, and all that good stuff. Here we go: Suppose there are 3 U.S....

    Started by guitargod2112‎, 10-26-2007 03:29 AM
    • Replies: 0
    • Views: 2,674
    10-26-2007, 03:29 AM Go to last post
  25. 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, 02-08-2015 12:36 AM
    combinations, combinatorics, probability
    • Replies: 0
    • Views: 1,518
    02-08-2015, 12:36 AM Go to last post
  26. Combinatorices

    Hello, I have a small question please... In a building there are 8 floors, in each floor, there are 4 flats. In each flat lives a couple ( man &...

    Started by WeeG‎, 07-22-2009 08:18 AM
    • Replies: 1
    • Views: 2,741
    07-22-2009, 03:53 PM Go to last post
  27. Exclamation Combinatorics

    Hey guys. I really struggle with combinatorics/permutations... It seems like I can't possibly translate a verbal question onto math. This mainly...

    Started by fiffette‎, 07-23-2013 04:52 PM
    • Replies: 1
    • Views: 1,860
    07-24-2013, 06:26 AM Go to last post
  28. Combinatorics + Statistics Question

    I have a homework question to find the probability that a permutation of 1000 symbols has between 432 and 789 cycles. X is a random variable denoting...

    Started by hgrin123‎, 03-22-2009 11:49 AM
    • Replies: 0
    • Views: 2,082
    03-22-2009, 11:49 AM Go to last post
  29. combinatorics ...

    Hey guys here's my confusion, any help clearing it up would be wonderful ... :) Let's say you've got 2 * 6-sided dice The sample space is 6^2 =...

    Started by SBruce‎, 07-22-2012 04:23 AM
    • Replies: 2
    • Views: 1,560
    07-22-2012, 11:21 PM Go to last post
  30. Combinatorics / Conditional Independence problems

    Every year, 6 Irish families, represented by 4 members each, meet up and rent 3 minivans of 8 seats each to go to a big festival. In order to mix...

    Started by thevariance‎, 10-30-2014 02:14 AM
    combinatorics, conditional independence, inclusion-exclusion
    • Replies: 0
    • Views: 1,332
    10-30-2014, 02:14 AM Go to last post
  31. Combine Normal Distributions

    How do you combine multiple normal distributions with different standard deviations and means, to produce one representative normal distribution? ...

    Started by x46949‎, 05-01-2011 03:23 PM
    • Replies: 12
    • Views: 20,768
    01-26-2013, 12:51 AM Go to last post
  32. Combined probabilities

    Hi all! I have a pretty interesting problem that I was hoping someone here could help me with. I am designing an application where a given user...

    Started by dbnelson2403‎, 07-24-2009 11:59 PM
    • Replies: 0
    • Views: 2,788
    07-24-2009, 11:59 PM Go to last post
  33. combining 2 probabilities

    I have a problem, its not a homework problem so I hope its ok for me to post here. I have calculated the probability that team A wont score a...

    Started by neeeel‎, 11-22-2010 09:06 PM
    • Replies: 2
    • Views: 2,903
    11-23-2010, 07:23 AM Go to last post
  34. Combining 2 transitional probability matrices?

    Hello, How would you/or is it possible to combine two transitional probability matrices? Say for example I have 2 matrices that both measure...

    Started by bradyj2‎, 02-21-2012 11:37 AM
    • Replies: 7
    • Views: 2,116
    02-22-2012, 07:21 AM Go to last post
  35. Combining Bernoulli distributions

    I'm looking for a way to find the standard deviation of a certain distribution. This distribution is created by performing n_0 Bernoulli trials with...

    Started by b_d‎, 07-18-2012 01:55 PM
    bernoulli, binomial, combining, distribution, probability
    • Replies: 4
    • Views: 1,682
    07-18-2012, 03:20 PM Go to last post
  36. Combining multiple probabilistic weather signals with cumulative binary dist

    If I have a stable of separate, independent models (N = 19 of them) that are using different inputs to each generate a probabilistic forecast for...

    Started by dallasdallas‎, 02-08-2017 09:33 PM
    • Replies: 0
    • Views: 1,418
    02-08-2017, 09:33 PM Go to last post
  37. Combining multiple probabilities

    Hi, Is it possible to add two or more probabilities together to get an overall probability? For example: There is a dichotomous outcome, let's...

    Started by lmsava‎, 07-21-2011 05:43 AM
    • Replies: 1
    • Views: 2,553
    07-21-2011, 06:43 AM Go to last post
  38. Combining pdf's for when a task will stop

    Hello, I have multiple tasks I want to run in succession, and I need to know at a given time what is the probability that they will both be done....

    Started by Statler‎, 12-20-2010 04:26 PM
    • Replies: 2
    • Views: 2,094
    12-20-2010, 06:27 PM Go to last post
  39. Combining properties of expected values and variances

    Hi! First post here so cut me a bit of slack Hopefully an easy topic too (I'm new to stats). If I have some values for E(X) (e.g. 5min) and...

    Started by slowrolla‎, 04-16-2013 04:05 PM
    • Replies: 1
    • Views: 1,816
    04-21-2013, 02:13 PM Go to last post
  40. Combining random variables, squared

    Been sitting with this for a while, and hoping wome of you can assist me. I'm given a pdf f(y) = 6y(1-y) for 0<y<1, and I want to calculate the pdf...

    Started by Chub‎, 03-11-2010 07:00 AM
    • Replies: 2
    • Views: 6,276
    03-11-2010, 12:45 PM Go to last post
  41. Combining standard deviation/normal distribution (do I have this right?)

    I have a variable with a mean of 52% and a standard deviation of 2.5%. However, the 52% mean was derived from an opinion poll which itself has a 3%...

    Started by provocateur‎, 11-16-2012 11:28 AM
    margin of error, normal distribution, standard deviation
    • Replies: 0
    • Views: 1,421
    11-16-2012, 11:28 AM Go to last post
  42. Red face Combining two data sets using Bayesian methods

    Hi, I want to combine multiple data sets of customer spend data together. I want to calculate how the bounds of the data decrease as I add in more...

    Started by Snow64‎, 02-02-2016 11:18 PM
    bayesian, combining models
    • Replies: 0
    • Views: 872
    02-02-2016, 11:18 PM Go to last post
  43. Combining two dependant discrete random variables

    Hi, Im looking for a way to combine two discrete random variables (which I have as probability distributions). The combination should be the...

    Started by simcc‎, 12-16-2011 03:38 AM
    • Replies: 1
    • Views: 5,331
    12-16-2011, 05:58 AM Go to last post
  44. Combining two different normal distributions.

    I have done the following question: In a hospital, 1/3 of the people who use a particular elevator are adults and 2/3 are children. The weight of...

    Started by univariate‎, 11-21-2010 09:55 PM
    • Replies: 10
    • Views: 15,842
    11-23-2010, 10:41 PM Go to last post
  45. 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: 2
    • Views: 1,278
    03-30-2015, 06:33 AM Go to last post
  46. Combining two sources of uncertainty

    I will use an imperfect dice for simplicity. Let's assume there are two factors that influence the probability of the results obtained from throwing...

    Started by BIal‎, 10-08-2017 09:24 AM
    distribution, probability
    • Replies: 2
    • Views: 191
    10-08-2017, 03:51 PM Go to last post
  47. Cominatorics Question ~ How many equations can be written with n variables?

    Hi everyone, currently I am doing a thesis paper. I have currently 7 variables I need to write in terms of the others to satisfy some homogeneity...

    Started by dannylimstata‎, 04-20-2012 02:56 PM
    • Replies: 2
    • Views: 1,733
    04-20-2012, 03:21 PM Go to last post
  48. Committee

    5 member group A-E What is the Probability of drawing 3 slips from a hat randomly , the committee contains A but not B ? to make up a 3 person...

    Started by future4000‎, 09-27-2007 03:24 PM
    • Replies: 1
    • Views: 2,241
    09-27-2007, 03:37 PM Go to last post
  49. Committee Combination

    Hi. I have used the below formulation of the problem. Kindly let me know whether I am correct or wrong. Q. "A condominium management committee...

    Started by fayyazcivil‎, 10-21-2014 03:20 PM
    probability help, probability homework help, probability question
    • Replies: 0
    • Views: 2,065
    10-21-2014, 03:20 PM Go to last post
  50. Comparing 2 choice simulations

    Hello there, I am stumped with a conceptual problem, for which I am sure there is a very simple solution. There are 2 computer models of...

    Started by Marc_J_Buehner‎, 04-12-2008 01:21 AM
    • Replies: 1
    • Views: 2,722
    04-14-2008, 07:03 PM Go to last post
  51. Comparing 2 continuous uniform distributions

    I have what appears to be a very simple problem, but am having difficulties working out a solution. Any help would be much appreciated. The...

    Started by economist1‎, 02-09-2012 10:55 AM
    probability distributions
    • Replies: 1
    • Views: 3,046
    02-09-2012, 02:02 PM Go to last post
  52. Comparing and balancing two outcome-production methods

    Hi, I've a question. :) I have a soccer videogame where teams have different strengths (16 to 621). The result of a match between two teams can be...

    Started by milivella‎, 11-02-2013 06:32 PM
    • Replies: 1
    • Views: 1,497
    11-03-2013, 04:06 AM Go to last post
  53. Comparing CDFs using Chi squared?

    HI, I have a set of data from which I can construct the cumulative distribution function. I then compare this contructed CDF with the CDFs of a...

    Started by aler‎, 07-09-2008 11:45 AM
    • Replies: 3
    • Views: 4,630
    07-10-2008, 07:44 AM Go to last post
  54. Comparing conditional probabilities?

    I have 250 respondents. Theyve reported their participation in three different kinds of political activities: reading about politics on line,...

    Started by DDN1972‎, 07-17-2008 07:08 PM
    • Replies: 2
    • Views: 2,878
    07-17-2008, 08:22 PM Go to last post
  55. Comparing Gaussian curves

    Hi, I have two points A(30.333,100) and B(30.333151665,80) I need to draw Gaussian for each point separately and need to check their overlap...

    Started by asd123‎, 03-04-2011 04:28 AM
    • Replies: 7
    • Views: 9,147
    08-31-2011, 05:35 PM Go to last post
  56. comparing pass/fail rates among teachers

    Suppose there are 1,050 students all age 15 and each student is randomly assigned to one of seven different teachers. However, teachers are allowed...

    Started by greg30043‎, 10-01-2012 10:20 PM
    • Replies: 6
    • Views: 4,884
    10-05-2012, 08:15 AM Go to last post
  57. Comparing probability distributions over discrete random variables

    Hi guys Sorry if the post is not in the right place but I am new here. I am comparing the performance of two monte carlo methods. The results I...

    Started by altober‎, 05-08-2011 07:38 AM
    compare, discrete random variables, kl divergence, monte carlo, probability distributions
    • Replies: 0
    • Views: 2,989
    05-08-2011, 07:38 AM Go to last post
  58. Comparing proportions

    Hello there: I have a couple of questions about comparing proportions. 1) why do we use a z-test to compare proportions but t-test to compare...

    Started by blue11‎, 09-21-2014 01:35 PM
    • Replies: 0
    • Views: 1,028
    09-21-2014, 01:35 PM Go to last post
  59. Comparing the skewness of two smaple distributions

    Hi Everyone, I wonder if anyone can help me here. Suppose I have two samples with, say, 100 observations in each, and I am not sure if the...

    Started by BigBugBuzz‎, 11-26-2010 06:53 AM
    • Replies: 1
    • Views: 3,756
    01-04-2011, 10:05 AM Go to last post
  60. comparing two Poissonians

    What is the proper statistical test for the following: I know A1 and A2 to be Poisson distributed with (unknown) means x1 and x2. I have a single...

    Started by ee00‎, 06-21-2010 11:05 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 5,880
    06-23-2010, 12:36 PM Go to last post

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