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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: 30,218
    09-30-2005, 09:44 AM Go to last post
  1. Keno problem: last ball doubles the prize.

    Hi, I'm trying to solve this problem, but apparently, Im going in the wrong direction. It's a Keno Game, you choose 15 balls out of 80...

    Started by paulaks‎, 05-20-2013 10:05 PM
    • Replies: 0
    • Views: 831
    05-20-2013, 10:05 PM Go to last post
  2. Greetings Everyone!

    Hello all! New to the forum and very excited to have a place to turn for help. I have two problems I have to do for my stat class, and I feel that...

    Started by fizoster‎, 02-24-2013 07:57 PM
    • Replies: 0
    • Views: 830
    02-24-2013, 07:57 PM Go to last post
  3. Probability of default

    What is the probability of default in 2 years? The probabilit of default year 1= 10% The probability of default year 2 = 10%

    Started by kronofogdn‎, 06-04-2015 02:03 AM
    • Replies: 0
    • Views: 827
    06-04-2015, 02:03 AM Go to last post
  4. Hypothesis testing - Type I and II error relationship needed

    Hi! Any idea about how to proof the inequality in formula 1 (see attatchment)? Thank you!

    Started by Lauralethia‎, 04-16-2017 06:49 PM
    • Replies: 0
    • Views: 807
    04-16-2017, 06:49 PM Go to last post
  5. How to calculate posterior probabilities (Bayes related, I think)

    I graduated Uni 16 years ago and generally have no problems with the math and stats I need in my life ... until today. I am breeding horses and there...

    Started by stp486‎, 05-26-2017 05:37 PM
    • Replies: 2
    • Views: 805
    05-27-2017, 09:30 PM Go to last post
  6. My program TARGETS

    I used a Monte Carlo method of finding probabilities of collisions between a randomly tossed circular block and non-overlapping randomly placed...

    Started by ArtK‎, 06-03-2015 02:42 PM
    • Replies: 0
    • Views: 804
    06-03-2015, 02:42 PM Go to last post
  7. 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: 800
    06-27-2014, 04:14 PM Go to last post
  8. Help With Potential Textbook Error

    I'm reading through the statistics chapter in my research methods textbook and think I may have found a mistake. I was hoping someone here could...

    Started by vw2000‎, 02-19-2013 06:06 PM
    • Replies: 5
    • Views: 795
    02-20-2013, 11:15 AM Go to last post
  9. two-sample Kolmogorov-Smirnov test

    Hello, Hello, I have recorded some discrete data with an unspecified distribution. I have generated some discrete data from a model. I'm...

    Started by bradyj2‎, 02-08-2013 08:54 AM
    • Replies: 0
    • Views: 789
    02-08-2013, 08:54 AM Go to last post
  10. Exclamation Probability of Sampling Error Assistance

    Hello! I am working on a mini project and am stuck on the third question! I think it's how the question is phrased that is throwing me off..? I...

    Started by heidir1224‎, 05-30-2017 11:36 PM
    • Replies: 0
    • Views: 783
    05-30-2017, 11:36 PM Go to last post
  11. Interpretation of likelihood ratio and hypothesis testing

    Even after extensive search, am unclear on some (basic) concepts regarding likelihood vs. frequentist approach in hypothesis testing. Can you...

    Started by natajax‎, 06-02-2016 03:08 AM
    likelihood, likelihood ratio
    • Replies: 0
    • Views: 782
    06-02-2016, 03:08 AM Go to last post
  12. Unhappy Help in understand this formula

    Hello to all, I'm working on a problem which is as follow: There is a buffer which has maximum K capacity to store items. When a request for an...

    Started by aram_2‎, 08-03-2012 05:12 AM
    • Replies: 1
    • Views: 772
    08-03-2012, 10:20 AM Go to last post
  13. Smile Hypothetical example of using probability to control emotions in business

    Imagine a company where there are two principals. The first person is the founder and owner of the company. The second person is nearly a partner...

    Started by jwoods76‎, 04-16-2017 05:23 PM
    • Replies: 0
    • Views: 764
    04-16-2017, 05:23 PM Go to last post
  14. A Puzzling Probability Problem

    Hello everyone. I have encountered these problems. I tried to answer them, but I'm not sure if they are correct.:: I would be very grateful if...

    Started by Gelo‎, 07-08-2017 12:13 PM
    • Replies: 4
    • Views: 740
    07-09-2017, 04:15 AM Go to last post
  15. Not Statistically Significant.... or is it?

    I am comparing 2 groups to see if there are differences in GPA across 4 years of high school. Group A has a higher mean for all 4 years, BUT... the...

    Started by Stinky‎, 08-31-2017 05:06 PM
    2 Pages
    1 2
    sum of means
    • Replies: 18
    • Views: 734
    09-02-2017, 10:52 AM Go to last post
  16. Is the order of an event occurs in a sequences of events random?

    I am interested in knowing how to analyse whether the order in which an event occurs within a sequence of events is random; i.e. is the likelihood of...

    Started by Jack Thorley‎, 05-25-2016 06:20 AM
    permutation test, randomisation, sequence data
    • Replies: 0
    • Views: 705
    05-25-2016, 06:20 AM Go to last post
  17. Essay Grouping Problem

    if i have 8 essay topics (a,b,c,d,w,x,y,z) and they will be randomly grouped into 2 groups of 4, what is the probability of getting group (a,b,c,d)?...

    Started by probabilityhelpneeded‎, 06-04-2017 12:26 PM
    • Replies: 1
    • Views: 705
    06-08-2017, 10:29 PM Go to last post
  18. decile

    hi experts. I 'd like to ask about cluster analysis. to identify the group of customer that which group will have high potential to cancel the...

    Started by Kimudao‎, 05-27-2017 11:34 PM
    • Replies: 0
    • Views: 683
    05-27-2017, 11:34 PM Go to last post
  19. Card Probability Problems

    Scenario: If you have a standard deck of 52 cards and you draw 2 of those cards without replacement, what is the probability of: 1) P(getting a...

    Started by SausageWater‎, 06-09-2017 05:58 PM
    • Replies: 1
    • Views: 682
    06-15-2017, 04:59 PM Go to last post
  20. Distribution of Data

    Hello forum members, I wonder if someone can kindly help. I have a dataset which I've uploaded and I'm trying to work out a sensible distribution....

    Started by jazzfish‎, 09-19-2017 05:33 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 600
    09-24-2017, 11:59 AM Go to last post
  21. Post urgent question on the mode, median, variance and mean

    We roll two (unbiased) dice and let X and Y be the two numbers that appear. Find the mode, the median, the expectation, and the standard deviation...

    Started by majda‎, 08-06-2017 06:36 AM
    • Replies: 1
    • Views: 558
    08-07-2017, 02:53 AM Go to last post
  22. Kruskal Walis & Wilcoxon test

    Hi all, it would be so kind if someone could explain to me as to why both equations, Kruskal Walis and Wilcoxon, consists of the number 12? The...

    Started by yuyanc‎, 08-11-2017 01:19 PM
    • Replies: 1
    • Views: 552
    08-11-2017, 02:01 PM Go to last post
  23. Negative Binomial Distribution for Variable Probabilities

    Hi, I wonder if someone can help me. I'm looking to estimate the probability of player a v player b winning a darts match where the player who...

    Started by jazzfish‎, 09-05-2017 10:51 AM
    • Replies: 8
    • Views: 544
    09-06-2017, 05:45 AM Go to last post
  24. Exclamation Probability of H/T Score AND F/T Score Being Specific Scores...

    Hi All, Just trying to answer something in my mind... If I had calculated (using poisson) the chances of various scores occurring in a football...

    Started by SMITH1988CJ‎, 05-30-2017 05:01 PM
    probability
    • Replies: 0
    • Views: 501
    05-30-2017, 05:01 PM Go to last post
  25. get number of participants from given probability

    Hi! I have a pool of participants - defined number of tournaments (competitions) - defined participants per tournament (partPerTour) Of...

    Started by Pir‎, 07-26-2017 07:08 AM
    • Replies: 1
    • Views: 437
    07-26-2017, 06:09 PM Go to last post
  26. Prob of high risk loans defauting, student text question

    Hi, first of all thanks for reading this. I'm 47 and trying to teach myself Stats from an excellent textbook as part of my course in maths and...

    Started by Koyunbaba‎, 08-03-2017 04:02 AM
    • Replies: 3
    • Views: 372
    08-03-2017, 04:29 PM Go to last post
  27. calculate intersection sets of cell clones in samples?

    Is it possible to calculate the probability of intersection sets in this setting? I have 44000 different cell clones in sample O, I donīt know how...

    Started by Rike133‎, 07-27-2017 06:58 AM
    • Replies: 0
    • Views: 369
    07-27-2017, 06:58 AM Go to last post
  28. a fair gambling game

    You want to invent a gambling game in which a person rolls two (unbiased) dice and is paid some money if the sum is 7, but otherwise he loses his...

    Started by majda‎, 08-06-2017 05:22 AM
    • Replies: 1
    • Views: 352
    08-06-2017, 05:37 AM Go to last post
  29. Simple Set THeory/Probability Problem

    Hello all, I'm very new to statistics as well as this forum, so please bear with me. I've tried solving this for about 30 minutes now and I've...

    Started by crk05‎, 09-19-2017 11:29 PM
    beginner, probability, set theory
    • Replies: 4
    • Views: 239
    09-20-2017, 02:16 PM Go to last post
  30. How many paths exist, probability, etc.

    Thanks for helping. I am taking an online course. Normally I would post my attempt...but I seriously do not know how to start this problem. I am...

    Started by DanielB33‎, 10-01-2017 10:30 AM
    • Replies: 1
    • Views: 229
    10-02-2017, 08:07 PM Go to last post
  31. Infinite summation outcome

    I'm awful with infinite summations! No idea how they did the last step in the proof in the attached image. Can anyone help me figure it out? And in...

    Started by jomak73‎, 09-30-2017 11:42 AM
    • Replies: 3
    • Views: 226
    10-07-2017, 07:08 PM Go to last post
  32. Question Help with what a question is asking

    I know how to calculate probabilities, but I want to make sure that I am understanding the question. "What is the probability that the Dow Jones...

    Started by Krazzy2013‎, 09-26-2017 08:40 AM
    clarification, probability, question
    • Replies: 4
    • Views: 224
    09-26-2017, 12:00 PM Go to last post
  33. Determine probabilty of a sampled value being <= 40

    Hi all! Brand new poster here, trying to think back to those stats classes that I hated at the time, but now seem fascinating. Ahhhh to be 18 again...

    Started by LogisticsG‎, 09-27-2017 07:08 PM
    • Replies: 2
    • Views: 218
    09-28-2017, 12:14 PM Go to last post
  34. Probability HW help

    I need help with these problems. I worked them out, got answers, and checked the back of the book to see if I got them correct. A pair of...

    Started by evzquz‎, 10-02-2017 05:03 PM
    dice, homework, probability, statistic
    • Replies: 1
    • Views: 204
    10-03-2017, 12:14 AM Go to last post
  35. Lightbulb I tried to calculate a probability problem..pls review my try?

    I will be straight and simple on explanation: Abstract: I was playing bingo in a mobile game with my friend, and I wondered, "what is the...

    Started by enoch53‎, 10-13-2017 01:30 PM
    bingo statistics, combination, probabilities
    • Replies: 4
    • Views: 198
    10-14-2017, 02:18 AM Go to last post
  36. What is the probability a particular sequence of 6 letters appearing in 13?

    What is the statistical probability a particular set of 6 letters appearing in a 13 alpha-numerical sequence in the case of: ...

    Started by Mark2015‎, 09-23-2017 04:25 AM
    • Replies: 1
    • Views: 192
    09-23-2017, 08:20 PM Go to last post
  37. 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: 186
    10-08-2017, 03:51 PM Go to last post
  38. Conditional probability problem

    Given P(A1) = .12, P(A2) = .07, P(A3) = .05, P(A1 U A2) = .13, P(A1 U A3) = .14, P(A2 U A3) = .10, and P(A1 A2 A3) = .01 What is the probability...

    Started by hankhopkins13‎, 10-07-2017 03:34 PM
    • Replies: 1
    • Views: 165
    10-08-2017, 05:21 AM Go to last post
  39. Probability summation help

    I have the following problem: Two cups, A and B, each contain 1 ml of the same infectious serum. If there is a 30% probability that I will get the...

    Started by fc63124‎, 10-07-2017 02:51 PM
    • Replies: 2
    • Views: 162
    10-07-2017, 04:41 PM Go to last post
  40. Sales Probability

    First post on this forum so I hope to explain my question appropriately. Our company issues catalogs to 3,000 customers. The products in this...

    Started by johnnyg‎, 09-29-2017 09:01 AM
    • Replies: 0
    • Views: 155
    09-29-2017, 09:01 AM Go to last post
  41. determining the most probable permutation of a set

    Is there any way to determine the most probable permutation of any given set? For example, given the set of letters SKTANH, is there a way to compute...

    Started by bonbonbaron‎, 09-30-2017 09:54 AM
    permutation, recurrent neural network, sequence
    • Replies: 2
    • Views: 155
    09-30-2017, 02:37 PM Go to last post
  42. Proof help plz

    I took the introduction of probability four years ago and I really can't remember how to solve this. Is there any hint on how should I start?...

    Started by nervedbaby‎, 10-12-2017 10:27 AM
    • Replies: 1
    • Views: 154
    10-13-2017, 03:19 AM Go to last post
  43. probobility of a tax inspecton

    From our statistics the probability of getting an inspection in any single week is a pprox 1,000 : 1 I was trying to work out the probability...

    Started by censura‎, 09-27-2017 06:40 PM
    • Replies: 1
    • Views: 137
    09-27-2017, 06:52 PM Go to last post
  44. 10x 1/100

    Hi all, Apologizes for the easy question: Imagine a dangerous mountain where the chance of dying is 1%. If a group of 10 hikes the moutain,...

    Started by STAlexis‎, 09-30-2017 08:58 PM
    • Replies: 1
    • Views: 135
    10-01-2017, 02:07 AM Go to last post
  45. Measuring strentgh of competing teams

    The average number of goals scored per match by Team A when playing on home ground is 2.2 with a standard deviation of 1.3 while the average number...

    Started by Onditi‎, 10-10-2017 10:53 AM
    • Replies: 0
    • Views: 114
    10-10-2017, 10:53 AM Go to last post
  46. multiplication rule with two random events?

    Exercise from mathint.com: "The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9 . If the...

    Started by bagocs‎, 10-03-2017 04:44 PM
    • Replies: 1
    • Views: 104
    10-06-2017, 03:41 PM Go to last post
  47. Ranking products according to their price and probability of sale

    Hello! I have little knowledge of statistics/probability theory, so please bear with me. I was wondering about the following: I have a bunch...

    Started by salt‎, 09-27-2017 08:57 AM
    • Replies: 0
    • Views: 101
    09-27-2017, 08:57 AM Go to last post
  48. Moved: Help, and I have no statistical background.

    I am taking a course in safety and now have one class left, but ran into a big problem. This class has statistics and I don't have a clue. The text...

    Started by double‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    03-01-2006, 01:08 PM Go to last post
  49. Moved: Data Entry

    Started by Matthew18342‎, 02-15-2013 01:15 PM
    • Replies: -
    • Views: -
    02-15-2013, 01:22 PM Go to last post

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