1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,200
+ Post New Thread
Page 1 of 91 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 5420

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: 25,972
    09-30-2005, 09:44 AM Go to last post
  1. probability of getting 4 aces when 5 cards are drawn

    Question: Find the probability of getting 4 aces when 5 cards are drawn from an ordinary deck of cards. Which of the followings is the correct...

    Started by woo‎, 06-22-2017 02:04 PM
    • Replies: 1
    • Views: 124
    Yesterday, 05:43 PM Go to last post
  2. 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: 205
    06-15-2017, 04:59 PM Go to last post
  3. conjoint analysis

    Hi how i can ask for which situation to use conjoint analysis?

    Started by Kimudao‎, 05-27-2017 11:45 PM
    • Replies: 3
    • Views: 404
    06-12-2017, 06:56 AM Go to last post
  4. 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: 253
    06-08-2017, 10:29 PM Go to last post
  5. Probability of Occurance

    Hi I'm new to probability and need help with what is probably a simple equation for you guys. I am trying to calculate the probability of even A...

    Started by Shiner452‎, 05-30-2017 09:14 PM
    • Replies: 3
    • Views: 496
    06-05-2017, 02:37 PM Go to last post
  6. probability of 3 in a row

    Hi the probability of 1 occurance is about 1 in 10 what i would like to calculate is the probability of 3 of these happening in a row at any time...

    Started by Insight10‎, 06-03-2017 03:46 PM
    • Replies: 3
    • Views: 293
    06-04-2017, 02:09 AM Go to last post
  7. 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: 249
    05-30-2017, 11:36 PM Go to last post
  8. Which probability distribution do I use for this, and how?

    Hi all, Im not a statistitian, although I have some reasonable education in mathematics. This isn't a homework question (I'm 37 lol), its just...

    Started by danlightbulb‎, 05-25-2017 04:25 PM
    • Replies: 9
    • Views: 479
    05-30-2017, 05:02 PM Go to last post
  9. 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: 151
    05-30-2017, 05:01 PM Go to last post
  10. Exclamation Minimum CDF of non-independent random variables

    How can I find the CDF for F_{X,Y}={x,x} if X,Y are not-independent. In other words, what will be Pr{min(X,Y)<x} if X,Y are not-independent? If I...

    Started by ghizall4‎, 05-28-2017 07:20 PM
    cdf, dependent, joint distribution, proability
    • Replies: 0
    • Views: 195
    05-28-2017, 07:20 PM Go to last post
  11. Minimum CDF of non-independent random variables

    How can I find the CDF for F_{X,Y}={x,x} if X,Y are not-independent. In other words, what will be Pr{min(X,Y)<x} if X,Y are not-independent? If I...

    Started by ghizall4‎, 05-28-2017 03:45 AM
    cdf, distributions, joint-distribution, probability, random-variable
    • Replies: 0
    • Views: 160
    05-28-2017, 03:45 AM Go to last post
  12. 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: 165
    05-27-2017, 11:34 PM Go to last post
  13. 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: 261
    05-27-2017, 09:30 PM Go to last post
  14. Simple Problem

    In a game, you: - Win 70 in scenario 1 - Win 4 in scenario 2 - Lose 20 in scenario3 - Lose 80 in scenario 4 For it to be a fair game, what...

    Started by 5feira‎, 05-19-2017 11:14 PM
    • Replies: 1
    • Views: 436
    05-20-2017, 04:20 AM Go to last post
  15. Distribution of a random sum of random non-iid variables

    I'm trying to find the probability distribution of a sum of a random number of variables which aren't identically distributed. Here's an example: ...

    Started by chaps‎, 05-10-2017 10:11 AM
    • Replies: 1
    • Views: 571
    05-11-2017, 03:32 AM Go to last post
  16. Smile Interpretation of probability density function - uniform distribution

    Dear all, I'm having some problems in the interpretation of the probability density function. Until now I thought that f(x) for a continuous...

    Started by Eometh‎, 05-09-2017 09:48 AM
    density function
    • Replies: 1
    • Views: 404
    05-09-2017, 11:34 PM Go to last post
  17. Smile Chi² distribution link with standard normal distribution?

    Hello, The chi² distribution is the sum of n random standard normal variables. It's used for example to know if a distribution fits the uniform...

    Started by Eometh‎, 04-28-2017 09:27 AM
    • Replies: 4
    • Views: 923
    04-30-2017, 04:26 AM Go to last post
  18. Help please on calculating probabilities of certain coin-flip outcomes

    Hi all, (Note: this is not a request for help with "homework"; I'm 51 years old and am trying to learn on my own, through my own "assignments" to...

    Started by lingyai‎, 04-26-2017 12:19 PM
    • Replies: 5
    • Views: 576
    04-28-2017, 06:10 PM Go to last post
  19. Expected number of tries to get all N balls

    We took my grandson to the Santa Cruz Boardwalk. He fell in love with the gondola ride. He wants to go back until he has ridden on all of the 32...

    Started by Jennifer Murphy‎, 04-25-2017 06:34 PM
    • Replies: 8
    • Views: 613
    04-27-2017, 10:10 PM Go to last post
  20. Basic Statistics

    I am sure this is a basic problem that is easily solvable, however, I have not been in a Statistics class in a little over 31 years and have all but...

    Started by mattman519‎, 04-25-2017 11:46 AM
    • Replies: 4
    • Views: 502
    04-27-2017, 05:38 PM Go to last post
  21. Time Series Analysis

    Hello All. I am a new member to this forum. I wish to understand a couple of papers ...

    Started by StatsOntheSide‎, 10-05-2011 08:00 PM
    • Replies: 7
    • Views: 5,063
    04-18-2017, 03:10 PM Go to last post
  22. A puzzling problem

    Hello all, I am posting here looking for help on solving a probability problem I have been struggling with for 2 days. It has been several years...

    Started by Jheath9131‎, 04-14-2017 07:33 AM
    • Replies: 3
    • Views: 519
    04-18-2017, 02:38 PM Go to last post
  23. Random Vectors and their inner product.

    Let's say i have two random vectors, X and Y, both of length n. The elements of either vector are not independent, and X and Y themselves are not...

    Started by Prometheus‎, 04-18-2017 09:53 AM
    • Replies: 0
    • Views: 420
    04-18-2017, 09:53 AM Go to last post
  24. [Discrete Probability Function] P(X²=1)= P(X=1) U P(X=-1)?

    I would like to know if this following form of interpretation is correct: ========================== Suppose I have a discrete probability...

    Started by Ardêncio‎, 04-18-2017 08:47 AM
    • Replies: 1
    • Views: 456
    04-18-2017, 09:18 AM Go to last post
  25. 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: 403
    04-16-2017, 06:49 PM Go to last post
  26. 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: 345
    04-16-2017, 05:23 PM Go to last post
  27. Conditional Probability

    I have some ambiguity in the following problem Three cards are drawn in succession from a deck without replacement. find the probability...

    Started by Roohul Amin‎, 03-29-2017 03:13 PM
    • Replies: 6
    • Views: 1,216
    03-30-2017, 04:11 PM Go to last post
  28. Exponential Distribution Conditional Probability

    Hello, I have been working with Exponential Distribution problems, but have not come across a problem like this one with both Exponential...

    Started by lucian044‎, 03-30-2017 01:52 PM
    conditional, exponential distribution, probability
    • Replies: 1
    • Views: 615
    03-30-2017, 03:42 PM Go to last post
  29. Unhappy ordering Probabilty in coin tosses

    Hi Guys, First post here so please accept my apologies if this question was posted before. This is baffling me for quite a few days now and I...

    Started by Panda101‎, 03-30-2017 12:01 PM
    • Replies: 4
    • Views: 506
    03-30-2017, 02:06 PM Go to last post
  30. Probability with Permutations Question

    Hello! This is my first time posting and I would appreciate any help at all! So the problem I'm working on has to do with randomly choosing letters...

    Started by lucian044‎, 03-30-2017 11:06 AM
    choose, letters, permutation, probability, random
    • Replies: 4
    • Views: 405
    03-30-2017, 11:58 AM Go to last post
  31. Conditional Probability

    Dear all Please help in solving the following problem. A large industrial firm uses 3 local motels to provide overnight accommodations for its...

    Started by Roohul Amin‎, 03-29-2017 04:10 AM
    • Replies: 1
    • Views: 502
    03-29-2017, 06:59 AM Go to last post
  32. Estimating probability of critical value

    Hello everyone, Once we get a critical value (for example 4.5) how can we estimate the probability of having a value higher than 4.5 if the...

    Started by Eometh‎, 03-24-2017 04:11 AM
    • Replies: 1
    • Views: 897
    03-24-2017, 09:11 AM Go to last post
  33. Probability and roundoff errors

    Hi, I work on a real life problem with roundoff errors and found a glitch in my thinking. If someone knows how to solve this problem I appreciate...

    Started by jcarne‎, 03-21-2017 04:34 PM
    • Replies: 1
    • Views: 659
    03-23-2017, 10:38 AM Go to last post
  34. Basic probability distribution table problem

    "What is P(X>4.74)". Can someone please explain how I'd go about this? Would it just be P(5) + P(6)? Thanks a lot.

    Started by touran‎, 03-19-2017 01:49 PM
    • Replies: 1
    • Views: 634
    03-19-2017, 02:51 PM Go to last post
  35. Union and intersection

    43% of adults are stockholders. 75% of adult stockholders have some college education. 37% of adults have some college education. An adult is...

    Started by Regulus‎, 03-14-2017 10:06 PM
    • Replies: 5
    • Views: 998
    03-18-2017, 06:05 PM Go to last post
  36. Urgent: Probability of having Lyme Disease and Bayes theorem

    I recently found a deer tick on me (had been there for several days). I have no symptoms. My Dr. says I could ignore it or take a course of...

    Started by ihf‎, 03-13-2017 09:44 AM
    bayes
    • Replies: 14
    • Views: 867
    03-13-2017, 06:02 PM Go to last post
  37. Post conditional probability

    Hello, I have a list of products and for each product corresponds an RCA index as shown in the attached table. I would like to calculate for both...

    Started by gammoudi‎, 03-09-2017 09:41 AM
    • Replies: 3
    • Views: 930
    03-09-2017, 04:09 PM Go to last post
  38. Confidence levels

    Hi, I need to calculate the confidence levels that I have enough staff at any point in time to service up to 6 tills in a supermarket. I have a...

    Started by Pigmy‎, 03-07-2017 02:23 PM
    • Replies: 3
    • Views: 943
    03-07-2017, 10:33 PM Go to last post
  39. CDF of a PDF with a negative power

    I need to solve the following problem: For a marine hull insurance policy, a claim occurs with probability 0.DD, where DD represents the two...

    Started by endlessend25‎, 03-03-2017 12:19 PM
    density function, self-study
    • Replies: 3
    • Views: 1,068
    03-04-2017, 12:06 AM Go to last post
  40. I need help with a difficult problem

    Here's the problem: Each trial can have 3 outcomes with different chances of each, let's say P(A) = .2, P(B) = .15, and P(C) = .65. I want to find...

    Started by Lazaeus‎, 03-03-2017 01:59 PM
    • Replies: 1
    • Views: 800
    03-03-2017, 05:02 PM Go to last post
  41. Exclamation Probability of an Event...in a certain Time!

    Hi Guys, This is probably a basic question for you lot...but let's say I had calculated the chance of an event happening (in this case lets say a...

    Started by SMITH1988CJ‎, 02-28-2017 05:25 PM
    probability
    • Replies: 4
    • Views: 1,023
    03-02-2017, 05:06 PM Go to last post
  42. bayes for generating new data

    I am estimating a tree inventory for a city. I have already measured the heights and identified the species for about 1000 trees in some areas of...

    Started by andyspeak‎, 03-01-2017 09:25 AM
    bayes, generate data, spatial statistics
    • Replies: 3
    • Views: 963
    03-02-2017, 04:20 AM Go to last post
  43. Roulette - expected value

    Hello, I want to calculate the expected pay-out of european roulette spins. Particularly, I want to know what is the expected pay-out at the...

    Started by federico.zampini‎, 02-09-2017 11:08 AM
    probab
    • Replies: 7
    • Views: 1,361
    03-02-2017, 04:06 AM Go to last post
  44. Exclamation Probability of developing a lung cancer disease

    I need to solve this problem: A cohort study is done to assess the impact of smoking on lung cancer. In this study, a large representative sample...

    Started by aptremblay‎, 03-01-2017 03:46 PM
    probability, probability homework help, statistics, statistics problems
    • Replies: 5
    • Views: 838
    03-01-2017, 06:30 PM Go to last post
  45. Different solutions when using direct calculation and Chebychev's inequality

    Hi all, I have a question that I can't find answer to: I have 10 random variables X1, X2....X10 which are all independent and exponentially...

    Started by stasezer‎, 02-22-2017 11:39 AM
    chebychev's inequality, probability density
    • Replies: 1
    • Views: 1,093
    02-23-2017, 06:05 PM Go to last post
  46. Fixing the low value and high value in a probabilistic simulation

    Hi, When doing repeated random sampling in a monte carlo method, is there a defined procedure to fixing the low value and high value of the...

    Started by depakroshanblu‎, 02-20-2017 08:58 AM
    • Replies: 10
    • Views: 1,295
    02-23-2017, 03:33 PM Go to last post
  47. Probability of storm surge given parameters for hurricanes.

    I've been working through some statistics problems and could use a little guidance on how to arrive at the right answer (and more importantly, why...

    Started by Foxhound013‎, 02-18-2017 05:35 PM
    • Replies: 4
    • Views: 1,140
    02-23-2017, 01:00 AM Go to last post
  48. Card drawing probability

    Hey all, I have been pondering about a problem in excel and cant seem to figure it out :/ Lets assume I have a card deck of 50 cards. My opening...

    Started by CameronNY‎, 02-20-2017 03:29 PM
    • Replies: 5
    • Views: 743
    02-21-2017, 02:47 AM Go to last post
  49. Probability of throwing n different numbers in m throws of a dice

    Folks I know how to calculate the probability of throwing the same number in every throw of a dice (die, if you prefer!), and I know how to...

    Started by Remster‎, 02-20-2017 05:03 AM
    dice, probability
    • Replies: 1
    • Views: 679
    02-20-2017, 11:03 PM Go to last post
  50. Mean waiting time due to aggregation of k poisson arrivals

    Dear Experts: I want to calculate the mean waiting time due to aggregation of k arrivals following poisson process with rate #λ#. Arrivals are served...

    Started by Hallian1990‎, 02-17-2017 05:59 PM
    probabilities, probability distributions, probability function, queuing, queuing theory
    • Replies: 1
    • Views: 1,004
    02-18-2017, 08:54 PM Go to last post
  51. Probability Question

    Hi Everyone, I'm looking to calculate the probability of the time taken for a specific event. I have: The best case scenario which normally...

    Started by goulding74‎, 02-17-2017 08:58 AM
    lean six sigma, probability
    • Replies: 1
    • Views: 750
    02-17-2017, 03:41 PM Go to last post
  52. Question on sampling without replacement

    Here is a question regarding sampling without replacement. Say there is a class size of 24, and the teacher is breaking students into groups of...

    Started by sjd7aa‎, 02-15-2017 08:30 PM
    • Replies: 1
    • Views: 914
    02-16-2017, 07:25 PM Go to last post
  53. Unhappy Conditional Probability Problem Help!

    Hey guys, I got this question as a practice problem. I believe that it's a conditional probability where I should find the probability of NOT...

    Started by nannan‎, 02-15-2017 09:00 PM
    • Replies: 1
    • Views: 1,074
    02-15-2017, 11:08 PM Go to last post
  54. MGF of sample mean of IID poisson RVs

    I am given the MGF of IID RVs as e^{\lambda(e^t-1)} and am supposed to find the MGF of their sample mean of n such RVs. I have am arriving at ...

    Started by nsus‎, 02-12-2017 11:02 AM
    mgf, sample mean
    • Replies: 5
    • Views: 1,361
    02-14-2017, 08:26 PM Go to last post
  55. Question Probability

    (This is a question on probability, not a discussion on politics. Hate or love the President, I hope you all can respond with a mathematical...

    Started by vspinnet‎, 02-13-2017 07:27 AM
    • Replies: 0
    • Views: 890
    02-13-2017, 07:27 AM Go to last post
  56. probability

    probability

    Started by asonibareoyindamola‎, 02-10-2017 07:49 PM
    • Replies: 1
    • Views: 1,018
    02-10-2017, 08:03 PM Go to last post
  57. Probability to draw an odd number before an even number

    There's 39 numbers in a jar and we're picking them without putting them back. The probability of drawing an odd number and then an even number is...

    Started by TheElder‎, 02-10-2017 06:27 PM
    • Replies: 3
    • Views: 965
    02-10-2017, 08:02 PM Go to last post
  58. A random variable's median and variance.

    -Part a) A box from 0 to 1 of height 1. What is its median ? Interpretation/Attempt: A random variable, X, is uniform, (So that its density is...

    Started by Kayl‎, 02-09-2017 05:43 AM
    probability mass function
    • Replies: 0
    • Views: 881
    02-09-2017, 05:43 AM Go to last post
  59. What is the difference between classical and bayesian understanding of probability?

    I am reading a book on monte carlo analysis and the author stresses in passing that the definition of probability used in an example in the book is...

    Started by noetsi‎, 02-07-2017 05:47 PM
    2 Pages
    1 2
    • Replies: 22
    • Views: 1,976
    02-08-2017, 10:28 PM Go to last post
  60. 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: 605
    02-08-2017, 09:33 PM Go to last post

+ Post New Thread
Page 1 of 91 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