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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: 30,309
    09-30-2005, 09:44 AM Go to last post
  1. Conditional Probability

    I've been working on this one for the last 3 days to no avail. The problem is this: "A statistics professor wants to ensure that she is not late...

    Started by mrkvvlt‎, 08-14-2006 06:20 PM
    • Replies: 1
    • Views: 5,786
    08-15-2006, 09:59 PM Go to last post
  2. Conditional Probability

    Hello, i am a tad confuzzled with conditional probability. I have a question i am half way through and i have hit a brick wall. It is given that:...

    Started by statshelp1‎, 01-19-2007 06:17 PM
    • Replies: 3
    • Views: 3,333
    01-20-2007, 09:44 AM Go to last post
  3. Question Conditional Probability

    I have been working on this problem for two hours and i can't seem to get it right! 28 crayons, 4 are red. they are divided among 4 people evenly....

    Started by Katy423‎, 02-02-2007 03:13 PM
    • Replies: 0
    • Views: 1,821
    02-02-2007, 03:13 PM Go to last post
  4. Conditional Probability

    I was given this example to study, no solution to check my work. Can you help? I approached (a) using 1-P?? 1-30/100 and (b) 30/100+10/100-5/100...

    Started by lshake‎, 06-17-2007 02:10 AM
    • Replies: 2
    • Views: 2,588
    06-18-2007, 12:59 AM Go to last post
  5. Conditional Probability

    I was hoping someone could shine some light on how to go about solving this question.... A dog has a litter of four pups. Assume, as usual, that...

    Started by anemro‎, 07-27-2008 02:25 PM
    • Replies: 1
    • Views: 2,101
    07-27-2008, 03:18 PM Go to last post
  6. Conditional Probability

    nvm figured it out!!! sorry!!

    Started by sykohawk‎, 09-18-2009 03:20 AM
    • Replies: 0
    • Views: 1,746
    09-18-2009, 03:20 AM Go to last post
  7. conditional probability

    hi, well i've just started to mess around the probabilities and the problem i don't understand is : if a probability for a person to finish his...

    Started by cro77‎, 03-03-2010 02:21 PM
    • Replies: 2
    • Views: 2,247
    03-19-2010, 02:40 AM Go to last post
  8. Conditional Probability

    What is the chance that the seventh card from the top of the deck will be a heart? This question really stumped me. I thought and then divided by...

    Started by Luis Felipe‎, 07-11-2010 10:31 AM
    • Replies: 5
    • Views: 4,631
    07-11-2010, 02:49 PM Go to last post
  9. Conditional Probability

    Hello, I have a question in probabilty. 100 Individuals. 40 with work experience, 30 with certificates and 20 with both work ex and...

    Started by tryinghard‎, 01-12-2011 11:01 PM
    • Replies: 1
    • Views: 3,339
    01-12-2011, 11:29 PM Go to last post
  10. Conditional Probability

    Hello!!! Can anyone help me with this problem??...please!!! In relation to Equation P(A│B)=P(AB) / P(B) Show that: P(A│B)P(B)=P(B│A)P(A)

    Started by af_231‎, 03-14-2011 10:37 PM
    • Replies: 5
    • Views: 2,689
    03-20-2011, 09:12 PM Go to last post
  11. conditional probability

    The table below displays data the First Bank of Silverhaven (FBS) has collected on the personal savings accounts of its job-holding customers. The...

    Started by likewhat22‎, 07-04-2012 09:45 PM
    probability
    • Replies: 3
    • Views: 10,886
    10-22-2013, 12:40 PM Go to last post
  12. Conditional probability

    Hi guys. I am currently preparing for SOA Exam P and am having some questions. In a survey of 94 students, the following data was obtained. 60...

    Started by ratloverice‎, 01-25-2013 01:19 PM
    • Replies: 0
    • Views: 1,343
    01-25-2013, 01:19 PM Go to last post
  13. Conditional Probability

    I need help with a couple of conditional probability questions: If a person is vaccinated properly, the probability of his/her getting a certain...

    Started by nancyspe‎, 11-20-2013 12:47 AM
    • Replies: 4
    • Views: 8,520
    11-20-2013, 10:57 PM Go to last post
  14. Conditional probability

    Hello all I need some assistance with this problem: Let A and B be two event such that: P(A|~B) = 1/2 and P(B|AUB)=2/5 Find P(B)

    Started by Yankel‎, 11-12-2013 04:50 AM
    • Replies: 1
    • Views: 1,092
    11-12-2013, 06:55 AM Go to last post
  15. Conditional Probability

    http://i.imgur.com/9UELFY5.png Here is the problem in question. I have the answers for both of these already,but I am not sure I have 2b correct. ...

    Started by StatScareMe‎, 12-14-2015 04:09 PM
    • Replies: 5
    • Views: 1,196
    12-14-2015, 05:18 PM Go to last post
  16. Lightbulb Conditional probability

    Hello, I'm having an issue with a problem. I just have no clue how to solve it. A machine part may be selected from any of three manufacturers...

    Started by dennissse‎, 01-16-2016 11:16 AM
    conditional, engineering, machine, probability, statistics
    • Replies: 2
    • Views: 1,904
    01-16-2016, 10:21 PM Go to last post
  17. Conditional probability

    I am consideriing the following identities: p(s' \lvert s,a) = p(x'_1,x'_2,c' \lvert x_1,x_2,c,a_1,a_2) = \pi(c'\lvert c)p(x'_2 \lvert...

    Started by JesperHP‎, 03-16-2016 06:14 PM
    • Replies: 0
    • Views: 1,522
    03-16-2016, 06:14 PM Go to last post
  18. Unhappy conditional probability

    For a combined ELISA-Western blot blood test for HIV positive status, the sensitivity P(positive test |HIV) is about 0.999 and the specificity...

    Started by RachelCrowley‎, 08-25-2016 10:15 AM
    • Replies: 2
    • Views: 1,643
    08-25-2016, 02:56 PM Go to last post
  19. Conditional Probability

    Hello to everyone. I am new in the forum and in the statistics at all. I have some homework to do and I can't figure it out. I am trying to do those...

    Started by xaocihno‎, 10-01-2016 08:56 AM
    • Replies: 4
    • Views: 2,070
    10-02-2016, 06:10 AM Go to last post
  20. 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: 2,230
    03-30-2017, 04:11 PM Go to last post
  21. 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: 1,245
    03-29-2017, 06:59 AM Go to last post
  22. 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: 1,988
    03-09-2017, 04:09 PM Go to last post
  23. Unhappy Conditional Probability (Please help me, I don't know how to continue from here.)

    Find the probabilities of getting (a) three 3's and then a 4 or 5 in four rolls of a balanced die. P(three 3's) = P(3rd is a three | 2nd is a...

    Started by Stupid Idiot‎, 09-24-2011 11:09 AM
    • Replies: 2
    • Views: 2,630
    09-24-2011, 12:02 PM Go to last post
  24. 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: 29,971
    07-13-2016, 01:00 AM Go to last post
  25. conditional probability and mgf question

    Hi i'm having trouble doing this question, any help would be much appreciated The time needed to defuse the bomb is modeled by a continuous...

    Started by lrado1‎, 09-12-2010 09:55 AM
    • Replies: 2
    • Views: 4,717
    09-12-2010, 05:44 PM Go to last post
  26. Question Conditional Probability and Negative Exponential distribution.

    Good day to everyone. I'm an italian computer science student, and i'm missing just an exam to get my long awaited Laurea... long story short, I had...

    Started by fade2black‎, 02-24-2012 01:03 PM
    • Replies: 4
    • Views: 3,336
    02-25-2012, 09:28 AM Go to last post
  27. conditional probability and size of population question.

    deleted post. no responses.

    Started by rummage‎, 09-07-2012 10:01 PM
    • Replies: 1
    • Views: 1,403
    09-08-2012, 05:47 PM Go to last post
  28. conditional probability and trial of experiments

    Consider a medical test for a disease, D. The test mostly gives the right answer, but not always. Say its false-negative rate is 1% and its...

    Started by asif‎, 05-14-2013 05:09 AM
    conditional probabilities, false negative, false positives, trial
    • Replies: 2
    • Views: 1,400
    05-15-2013, 07:43 AM Go to last post
  29. Question Conditional Probability and Variance

    In a conditional probability problem, I have computed Var(X|Y=y) for all values of y. How would I go about computing the Var(X) using this...

    Started by ProbabilityPrincess‎, 04-20-2006 09:59 PM
    • Replies: 0
    • Views: 3,990
    04-20-2006, 09:59 PM Go to last post
  30. Conditional probability answer check

    I just want to check my answer with you guys. A supermarket wants to know peoples shopping habits. 250 were surveyed. 60% was females. 70% of all...

    Started by ar0157‎, 10-15-2015 08:37 PM
    • Replies: 1
    • Views: 1,469
    10-15-2015, 09:36 PM Go to last post
  31. Conditional Probability between two events

    A jungle consists of two neighboring forests, A and B, which are separated with a river in between. The chance of finding a particular species of...

    Started by maple1988‎, 06-16-2011 10:48 PM
    • Replies: 0
    • Views: 1,725
    06-16-2011, 10:48 PM Go to last post
  32. Conditional probability calculation

    Please can someone help me with the following question: An urn contains 3 white, 6 red and 5 black balls. Six of these balls are randomly selected...

    Started by Angela_o‎, 07-29-2011 02:55 AM
    • Replies: 1
    • Views: 7,435
    08-08-2011, 11:16 AM Go to last post
  33. Conditional probability density function, practical example

    Greetings to all the ones who are accepting to help people and greeting to the ones who are browsing in the forum! We have 2 independent random...

    Started by Baillya‎, 10-02-2012 03:44 AM
    • Replies: 2
    • Views: 4,836
    10-03-2012, 03:07 AM Go to last post
  34. Conditional Probability Help.

    Helloooo Statisticians! I have a question that I believe I can solve but somehow I'm not getting the correct answer. So I'd really appreciate if...

    Started by Lazyeconomist‎, 08-23-2013 12:40 PM
    conditional probabilities, probability, probability distribution, probability help, probability question
    • Replies: 3
    • Views: 2,012
    08-23-2013, 02:58 PM Go to last post
  35. Conditional probability inequality

    Let f be an arbitrary function, let g be a strictly increasing function and let h be strictly convex. I'm trying to prove the following, which seems...

    Started by Leo Simon‎, 07-26-2013 07:14 PM
    • Replies: 3
    • Views: 2,658
    07-28-2013, 08:29 AM Go to last post
  36. conditional probability mass function

    Is my solution correct (Q) Suppose that p(x, y), the joint probability mass function of X and Y, is given by p(0, 0) = 0.4 p(0, 1) = 0.2 p(1, 0)...

    Started by MTE-11‎, 10-27-2011 04:52 AM
    • Replies: 0
    • Views: 2,636
    10-27-2011, 04:52 AM Go to last post
  37. Conditional probability of an event given two independent events

    I am dealing with an interesting probability problem. I had 16 subjects randomly divided into 4 different rooms, each room having 4 seats. The...

    Started by Blain Waan‎, 01-19-2015 11:17 AM
    probability, probability help, probability question
    • Replies: 2
    • Views: 1,884
    01-20-2015, 08:14 AM Go to last post
  38. Conditional probability of an event that never occurred

    Hi folks, I'm facing a problem right now...given three events A, B and C, is it possible to estimate the occurrence of events A and C together...

    Started by keyser3‎, 11-24-2010 07:47 AM
    • Replies: 1
    • Views: 1,933
    11-30-2010, 12:22 PM Go to last post
  39. Conditional probability of functions. Small question

    Hey, i was just looking at a question where the question is calculate: P( B(t) =< x| x=B(s) ). That is, calculate the probability that B(t) is less...

    Started by andreme91‎, 05-12-2016 06:29 AM
    conditional probability, probability
    • Replies: 0
    • Views: 933
    05-12-2016, 06:29 AM Go to last post
  40. conditional probability problem

    can anyone give hint? if i apply the usual conditional probability rule what i get, for the 1st one say, is f(sigma_theta^2, sigma^2, mu, theta,...

    Started by dwen‎, 05-13-2008 09:28 PM
    • Replies: 0
    • Views: 2,140
    05-13-2008, 09:28 PM Go to last post
  41. Question conditional probability problem

    Here's the question: The voters in a large city are 50% white, 40% black, and 10% Hispanic. Candidate Smith wins 40% of the white vote, 80% of...

    Started by dumbcollegestudent‎, 11-01-2009 01:04 PM
    • Replies: 2
    • Views: 4,525
    11-01-2009, 05:32 PM Go to last post
  42. Conditional Probability Problem

    Hello all! I have a probability test tomorrow and have been working through practice problems but I ran into one that is giving me troubles. We...

    Started by ldg21‎, 12-15-2010 06:57 PM
    • Replies: 2
    • Views: 3,569
    12-15-2010, 08:27 PM Go to last post
  43. Conditional probability problem

    Hi, So here's the problem I've been working on for several hours now: "Deer ticks can be carriers of either Lyme disease or HGE. Based on a...

    Started by daydreamset‎, 02-05-2012 07:29 AM
    • Replies: 7
    • Views: 5,985
    02-06-2012, 09:27 PM Go to last post
  44. Question Conditional probability problem

    One in five of Cadbury's specially marked chocolate bars (Promotion Products) will be packaged in a wrapper that entitles the holder to an instant...

    Started by lemon_kaka‎, 08-27-2013 10:46 PM
    • Replies: 3
    • Views: 2,041
    08-28-2013, 01:13 AM Go to last post
  45. Conditional probability problem

    Hey all, I hope you can help me with this problem. Say that tomorrow I can go to Berlim with a probability of 20%, Madrid with a probability of...

    Started by joaorob‎, 09-22-2013 06:47 AM
    conditional probability
    • Replies: 1
    • Views: 1,356
    09-22-2013, 02:12 PM Go to last post
  46. 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: 177
    10-08-2017, 05:21 AM Go to last post
  47. 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: 1,891
    02-15-2017, 11:08 PM Go to last post
  48. Conditional Probability question

    okay the problem statement is as follows A gene can be either type A or type B (ie note type A). A gene can also be either dominant or regressive....

    Started by Creol‎, 10-08-2008 12:54 PM
    • Replies: 3
    • Views: 2,528
    10-09-2008, 11:21 AM Go to last post
  49. Conditional probability Question

    Hello, I'm trying to work out a conditional probability. I have two measurements of two variables (1) Start Time and (2) Distance. I've...

    Started by bradyj2‎, 06-22-2012 07:21 AM
    • Replies: 1
    • Views: 1,347
    06-22-2012, 10:31 AM Go to last post
  50. Conditional probability Question

    Hi Guys, Could I ask a question with regards to probability theory? I have recorded some journey distances for cars. Here is an example. The...

    Started by bradyj2‎, 07-24-2012 08:55 AM
    • Replies: 1
    • Views: 1,240
    07-26-2012, 01:35 PM Go to last post
  51. Conditional probability question

    Hi there, I have the journey times of 2 journeys. Would somebody be able to show me by way of example how to calculate the conditional...

    Started by bradyj2‎, 09-18-2012 09:26 AM
    • Replies: 0
    • Views: 980
    09-18-2012, 09:26 AM Go to last post
  52. conditional probability question

    I'm having trouble with the following problem: I want to know P(X>C | W>C) with C a known fixed constant, X and W both normally distributed...

    Started by Alex C‎, 04-15-2016 10:28 AM
    • Replies: 0
    • Views: 1,084
    04-15-2016, 10:28 AM Go to last post
  53. Post Conditional Probability question???? Help me ,please

    1. Data on the 30 largest stock and balanced funds provided one-year and five year percentage returns for the period ending ending March 31, 2000...

    Started by trongboy16‎, 02-11-2014 02:21 AM
    • Replies: 0
    • Views: 1,649
    02-11-2014, 02:21 AM Go to last post
  54. Conditional Probability Questions

    Hey guys, pretty simple question here (for yall I hope).... I'm trying to calculate a conditional probability, but I'm drawing the probabilities...

    Started by Mark G‎, 11-15-2012 05:32 PM
    • Replies: 2
    • Views: 1,477
    11-15-2012, 09:40 PM Go to last post
  55. conditional probability sanity check

    A device fails by going into mode A or mode B. There are many more ways to fail within the mode A category than within the mode B category. Given...

    Started by Outlier‎, 06-08-2011 12:47 PM
    • Replies: 3
    • Views: 2,246
    06-08-2011, 04:43 PM Go to last post
  56. Conditional Probability using Bayes' Theorem

    Hello, I am trying to solve this conditional probability question: A certain college has observed that 20% of its freshmen are unqualified and drop...

    Started by S-C-3-1-3‎, 09-23-2012 10:36 PM
    • Replies: 8
    • Views: 5,767
    09-24-2012, 02:33 PM Go to last post
  57. Conditional Probability Venn Diagram

    I am having a very difficult time trying to determine how they got the probabilities shown in the Venn Diagram from the above information. I'm...

    Started by JoeO15‎, 10-16-2011 03:16 PM
    • Replies: 3
    • Views: 5,529
    10-17-2011, 03:09 AM Go to last post
  58. Conditional probability with Binomial distribution

    Hello all I am trying to make a calculation here, and the result doesn't make sense to me, I don't know what I am doing wrong... I have a...

    Started by NN_STAT‎, 08-15-2013 02:51 AM
    • Replies: 4
    • Views: 7,657
    08-15-2013, 03:27 PM Go to last post
  59. Smile Conditional Probability [HELP]

    I = innocent, G= guilty P(I) = 1, P(G) = 0 Conditional Probability Test Results: P(+ | I ) =0, P(+ | G ) = 1 Find P(G | +) in other words...

    Started by cheri3‎, 09-07-2007 07:41 PM
    • Replies: 5
    • Views: 2,539
    09-11-2007, 06:02 PM Go to last post
  60. Conditional Probability...

    Hello, I'm working on a problem, and I think I'm doing it correctly, but it doesn't really match what I wrote down in class - so I think maybe I...

    Started by mackerbuddy‎, 11-11-2005 04:49 AM
    • Replies: 1
    • Views: 7,130
    11-11-2005, 12:50 PM Go to last post

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