1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,767
+ Post New Thread
Page 15 of 91 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 65 ... LastLast
Threads 841 to 900 of 5449

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: 30,168
    09-30-2005, 09:44 AM Go to last post
  1. A Drunkard's Random Walk

    Here's a homework problem that I need a hint to get started. D drunkard is taking a random walk. he canstep north or shouth with probability .5...

    Started by statsmom‎, 10-25-2008 11:24 PM
    • Replies: 3
    • Views: 4,766
    10-26-2008, 10:04 PM Go to last post
  2. Variance?

    Hi All, In an assembly-line production of industrial robots, gearbox assemblies can be installed in one minute each if holes have been properly...

    Started by MonitorStats‎, 04-05-2009 10:59 AM
    • Replies: 0
    • Views: 4,763
    04-05-2009, 10:59 AM Go to last post
  3. exponential distribution light bulbs hypothesis testing

    Two companies make a similar light bulb. Suppose random samples of light bulbs from both companies are obtained and the lifetimes for these light...

    Started by whiteboard‎, 10-01-2011 08:59 AM
    • Replies: 3
    • Views: 4,761
    10-06-2011, 12:05 PM Go to last post
  4. Probability of a player winning a best-of-n contest with a given current scoreline...

    Many sports are played over a best-of-n format, where the first player to reach a specified number games won wins the overall contest. An example...

    Started by marcolan‎, 05-02-2011 10:29 AM
    • Replies: 8
    • Views: 4,758
    01-16-2012, 10:24 AM Go to last post
  5. Joint/Marginal PDF question

    OK, I have this problem on my hw I am struggling through. Random vector (X,Y) has the joint pdf f(x,y) = c(x^2+y^2), for x^2+y^2<1, and = 0...

    Started by kditrag‎, 07-28-2008 11:58 AM
    • Replies: 1
    • Views: 4,750
    07-31-2008, 04:33 PM Go to last post
  6. I need help ASAP!?!?!

    I am having trouble with these problems on my homework. I can't seen to grasp the concept and set up on how to solve these problems. The numbers...

    Started by mrmntss‎, 10-08-2006 06:17 PM
    • Replies: 1
    • Views: 4,746
    10-09-2006, 10:26 AM Go to last post
  7. I need help with this probability problem

    Hello everyone, I am trying to figure out which probability formula/approach I should use. Any help is greatly appreciated! :) Let's say that...

    Started by Stat77‎, 12-16-2008 05:09 PM
    • Replies: 2
    • Views: 4,745
    12-26-2008, 12:32 PM Go to last post
  8. Simple probability question

    Test question: Assume that it is equally likely for a pregnancy to deliver a baby boy or a baby girl. Suppose that for a particular large...

    Started by jll6m‎, 05-05-2010 04:05 PM
    • Replies: 4
    • Views: 4,745
    05-06-2010, 12:25 PM Go to last post
  9. normal approximation to binomial distribution.

    hi everyone. so i have this stupid final project and i'm pretty sure i know how to do it but i just wanted to check my method. the question...

    Started by fade0ut‎, 01-21-2008 06:59 PM
    • Replies: 0
    • Views: 4,742
    01-21-2008, 06:59 PM Go to last post
  10. On estimating an underlying probability distribution

    Dear Forum readers! Every now and then our university makes a poll among the students, asking questions like "How good was the lecture" to which...

    Started by hanspi‎, 01-03-2011 08:35 AM
    • Replies: 2
    • Views: 4,742
    01-04-2011, 10:00 AM Go to last post
  11. Baye's Formula Confusion!

    Hello, I think I have answered most of this question correctly, but do not quite understand how to find P(D^c|F^c) . The question is as...

    Started by Slime‎, 01-13-2013 12:15 AM
    • Replies: 3
    • Views: 4,737
    01-13-2013, 06:49 PM Go to last post
  12. Poisson Probabilities

    Hi, I have the feeling this is a really easy question but am having a mental block at the moment on a past exam paper question so I am hoping that...

    Started by itjaw‎, 06-15-2008 02:14 AM
    • Replies: 3
    • Views: 4,736
    06-15-2008, 04:50 PM Go to last post
  13. Baye's Rule Help

    Hello I have this question and I am having trouble figuring it out. Medical case histories indicate that different illnesses may produce...

    Started by HHPS‎, 03-08-2012 06:17 PM
    • Replies: 3
    • Views: 4,733
    03-09-2012, 12:43 PM Go to last post
  14. Help!

    I need help with this problem: a wildlife biologist examines frogs for a genetic trait he suspects may be linked to sensitivity to industry toxins...

    Started by dkman‎, 04-23-2007 02:12 PM
    • Replies: 2
    • Views: 4,725
    04-26-2007, 12:27 AM Go to last post
  15. Probability Problem related to Actuarial Sceince P1

    An insurer o ers a health plan to the employees of a large company. As part of this plan, the individual employees may choose exactly two of the...

    Started by akki‎, 02-26-2010 09:18 AM
    • Replies: 0
    • Views: 4,724
    02-26-2010, 09:18 AM Go to last post
  16. Poisson Distribution

    Hi all, it's me again! Just got a quick question here with the poisson distribution. Suppose messages arrive at a voice mail system according to a...

    Started by jamesmartinn‎, 04-03-2009 06:48 PM
    • Replies: 4
    • Views: 4,723
    04-06-2009, 10:23 AM Go to last post
  17. Question mathematical expectation

    A despondent math professor is traveling to Las Vegas to bet his entire life savings, $20,000, on one roll of the (two) dice. If the total is 7 or...

    Started by summertigger‎, 12-18-2005 09:16 PM
    • Replies: 4
    • Views: 4,721
    04-27-2006, 10:47 AM Go to last post
  18. Transformations....again!

    Let X, Y ~ Uniform(0,1). Define the PDF of i) X - Y ii) X/Y I know this problem can be solved by creating a picture and looking at the areas....

    Started by jamesmartinn‎, 10-11-2010 01:50 PM
    • Replies: 4
    • Views: 4,720
    12-06-2010, 10:57 PM Go to last post
  19. Probability ?

    Assume that each year the IRS randomly audits 10% of the tax returns. If a married couple has filed seperate returns, a. what is the prob that both...

    Started by KmClark84‎, 11-13-2006 10:23 PM
    • Replies: 1
    • Views: 4,715
    11-15-2006, 06:01 PM Go to last post
  20. Need some help with basic probability!

    Hey, I need some help with two probability question, and I would really appriciate all the help I can get! QUESTION 1: (a) A quality inspector...

    Started by madni‎, 09-14-2011 04:40 PM
    • Replies: 5
    • Views: 4,715
    09-16-2011, 03:43 AM Go to last post
  21. deciles

    Women's weights are normally distributed with a mean of 143 lb and a standard deviation of 29lb. Find the third decile, D3, which separates the...

    Started by megs915‎, 10-24-2005 12:06 PM
    • Replies: 1
    • Views: 4,714
    10-24-2005, 12:20 PM Go to last post
  22. Overlaping Normal Curves

    Folks, In an ecological model, I must compute the overlap of two standardized normal curves (correct term? ... areas of 1, but means and...

    Started by Rboone2020‎, 09-28-2006 05:14 PM
    • Replies: 14
    • Views: 4,714
    10-05-2006, 11:03 AM Go to last post
  23. probability problem please help

    A college use two different textbooks during the last semester. During last semester 0.7 students used the text book by Professor B. and 0.3 students...

    Started by th3plan‎, 02-18-2009 12:04 AM
    • Replies: 4
    • Views: 4,713
    02-18-2009, 12:56 AM Go to last post
  24. Homework Problem

    Hi, I am a beginner in statistics, and can't figure out this problem: "In a highly publicized murder trial it was estimated that 25 percent of the...

    Started by bornconfused‎, 03-27-2011 01:12 AM
    anomaly, one-proportion test
    • Replies: 3
    • Views: 4,712
    03-31-2011, 12:47 AM Go to last post
  25. Finding probability of passing test by guessing

    Hello, I am confused about this problem: There are 50 4 choice questions out of which at least 25 must be correct in order to pass. If a student...

    Started by dina786‎, 10-01-2012 06:04 PM
    • Replies: 2
    • Views: 4,705
    10-01-2012, 11:23 PM Go to last post
  26. Am I right?

    The odds are two to one that when A and B play tennis A wins. Suppose that A and B play two matches. What is the probability that A wins at least...

    Started by structstat‎, 09-01-2006 05:51 PM
    • Replies: 2
    • Views: 4,701
    09-01-2006, 06:37 PM Go to last post
  27. another Probabilty distribution :)

    Hi, okay here is another probabitly question that I was having trouble with. Q1: A company services home air conditioners. It is knwon that time...

    Started by Michelle‎, 06-01-2006 08:46 PM
    • Replies: 0
    • Views: 4,700
    06-01-2006, 08:46 PM Go to last post
  28. Conditional Expectation Problem

    Hi all I need to solve the following problem: If E(X|Y)=Y and E(Y|X)=X, prove that X=Y almost surely. Seems like I'll need to use the...

    Started by symmetry‎, 03-25-2011 10:18 PM
    • Replies: 5
    • Views: 4,697
    03-26-2011, 12:36 PM Go to last post
  29. Probabilities. Is this correct?

    In a study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual. Suppose that...

    Started by Wikkid1‎, 10-19-2007 07:07 AM
    • Replies: 0
    • Views: 4,693
    10-19-2007, 07:07 AM Go to last post
  30. Unhappy problem with all laws...

    I have to pass a test on-line, but I really don't get it. I need to pass it at least 3 times without mistakes (knowing it does change every time i...

    Started by caora‎, 11-21-2005 02:07 PM
    • Replies: 3
    • Views: 4,690
    11-22-2005, 03:47 PM Go to last post
  31. Probability that one group of successes will be greater than another

    So, I'm working on this big old nerdy project, but I haven't got much of a head for statistics. I was wondering if someone would be able to help me....

    Started by heavyarms553‎, 06-12-2009 09:48 PM
    • Replies: 5
    • Views: 4,688
    08-26-2009, 11:34 AM Go to last post
  32. Unhappy Finding the right Gamma distribution

    Hi all, I am a Masters Student working on a simulation model. As part of model construction I have to assign probability distributions for each...

    Started by yayo1984‎, 08-27-2010 12:53 AM
    • Replies: 3
    • Views: 4,688
    08-27-2010, 11:54 PM Go to last post
  33. reallyneedhelpwithexpectedvalues

    I was wondering if anyone could help with the following: Magazine has 1,620,000 subscribers 640,000 - women 980,00 - men 30% OF WOMEN read...

    Started by glucky‎, 10-23-2006 06:12 PM
    • Replies: 3
    • Views: 4,686
    10-23-2006, 11:27 PM Go to last post
  34. Probability - Multiplication/addition rules?

    I have been working on this problem and have come up with answers, but I have a feeling they are wrong...Hoping people much more intelligent in...

    Started by DryMouse‎, 07-01-2008 12:44 AM
    • Replies: 6
    • Views: 4,686
    07-01-2008, 11:16 PM Go to last post
  35. Exclamation help with expected value

    1. Let X,Y and Z be 3 random variables, and X and Z are independent. Prove that Cov(X+Y,Z)=Cov(Y,Z). For this i expanded into E(Z(X+Y)) -...

    Started by omega‎, 11-06-2010 08:43 PM
    • Replies: 6
    • Views: 4,686
    11-07-2010, 01:09 PM Go to last post
  36. Dice probability question - Settlers of Catan

    Hello everyone, Let me begin by saying that this isn't a homework question. Rather, this is a question that relates to a personal inquiry into...

    Started by PrettyCities‎, 12-06-2013 08:26 PM
    • Replies: 3
    • Views: 4,685
    12-07-2013, 06:40 AM Go to last post
  37. moment generating function problem

    Hi everyone, I'm stuck on a probability problem and was wondering if anyone could help me get started? I would really appreciate it! Let X,Y,Z be...

    Started by oj2222‎, 11-20-2010 09:38 PM
    • Replies: 3
    • Views: 4,678
    11-21-2010, 09:57 PM Go to last post
  38. 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: 4,676
    09-12-2010, 05:44 PM Go to last post
  39. Computing pobabilities for any normal probability Dist.

    Greetings all, I am a math challenged individual in the middle of a stats class and (you've heard it before) seriously struggling with story...

    Started by 1Moretime‎, 10-14-2012 11:23 AM
    • Replies: 2
    • Views: 4,672
    10-14-2012, 03:23 PM Go to last post
  40. kurtosis

    Hi, I am calculating the skewness of returns of 10,000 randomly selected portfolios with different portfolio sizes(where assets range from 2 to...

    Started by 12345678‎, 10-27-2006 08:23 PM
    • Replies: 2
    • Views: 4,668
    11-17-2006, 09:47 PM Go to last post
  41. Bivariate Normal distribution

    I want to get the characteristic function of the bivariate normal distribution when both means =0 and variances =1 . I can't do the integration. In...

    Started by Emy‎, 06-26-2010 03:52 AM
    • Replies: 7
    • Views: 4,664
    06-26-2010, 02:28 PM Go to last post
  42. pls help me with im desperate

    a local bank reports that 70% of its customer maintain a chequing account, 50% have a savings account an d 40% have both. of a customer is chosen...

    Started by sweetx‎, 08-29-2006 10:36 PM
    • Replies: 2
    • Views: 4,663
    08-31-2006, 11:42 PM Go to last post
  43. Random sample from a gamma distribution, several questions about same problem

    Consider a random sample X1, X2, ... ,Xn from a Γ(α=3, λ=1/θ) distribution. So far i have figured the following out: p.d.f = /3Γ] x^2 e^(-x/θ)...

    Started by primomontesi‎, 03-23-2009 10:04 PM
    • Replies: 1
    • Views: 4,654
    03-24-2009, 11:50 AM Go to last post
  44. Basic Probability Question

    I have a question regarding basic proability. In the problem outlined below I am worried that I have calculated incorrectly. More specifically, I...

    Started by caransom‎, 10-21-2006 05:42 PM
    • Replies: 2
    • Views: 4,653
    10-22-2006, 02:53 PM Go to last post
  45. Question Confused About Probability?

    Hey all, I'm currently a stats student and i have run into confusion about some questions pertaining to probability. I have attempted the following...

    Started by Jeff_McD18‎, 01-19-2011 10:26 PM
    probability question
    • Replies: 14
    • Views: 4,653
    01-20-2011, 12:06 PM Go to last post
  46. Unhappy Binomial Probability Distributions

    I am having alot of difficulty in my bio-statistics class can anyone help with these 2 questions? Create pmf and histogram before answering these...

    Started by ktladyk25‎, 10-06-2009 12:25 PM
    • Replies: 1
    • Views: 4,651
    10-06-2009, 01:08 PM Go to last post
  47. Bionomial distribution:expected value problem question

    : The FBI Standard survey of crimes shows that for about 80% of all property crimes, the criminals arenever found and the case is never solved....

    Started by Nellen2222‎, 10-07-2012 06:19 PM
    • Replies: 3
    • Views: 4,645
    10-08-2012, 04:48 AM Go to last post
  48. Dependent or Independent

    Hello, I am asked the following in an assignment: Let A be the event that a letter picked at random from a piece of English text is T and let B...

    Started by jocali‎, 11-01-2010 05:41 PM
    • Replies: 11
    • Views: 4,644
    11-03-2010, 12:57 PM Go to last post
  49. central limit theorem question check?

    Hi! The question states: "Suppose that, historically, one-third of the graduating seniors at a certain college have two parents who attend the...

    Started by Seratina‎, 10-28-2007 03:06 PM
    • Replies: 0
    • Views: 4,641
    10-28-2007, 03:06 PM Go to last post
  50. candy

    A candy store owner has daily demand Y for a certain brand of candy sold from the bulk bins. Suppose the owner will never stock more than one...

    Started by megs915‎, 10-24-2005 12:05 PM
    • Replies: 5
    • Views: 4,634
    10-25-2005, 04:51 PM Go to last post
  51. Talking i hope i make JohnM and quark proud

    :eek: okay i managed to do a bonus question on my "take home test" (which is kinda :) . I just want to see if I did it right and answered it...

    Started by hilarysears77‎, 10-10-2005 05:37 PM
    • Replies: 5
    • Views: 4,630
    10-10-2005, 08:33 PM Go to last post
  52. Homework Help - Balls in Urn problem (hypergeometric distribution?)

    Hi all, I need help with the following problem: The urn contains 5 black and 8 red balls. You close your eyes and remove balls from the urn...

    Started by dizzle1518‎, 04-26-2011 03:07 PM
    • Replies: 5
    • Views: 4,626
    04-29-2011, 10:18 AM Go to last post
  53. Given Joint Density Function

    f(x) { x(1+3y^2)/4 0<x<2, 0<y<1 0 otherwise 1. Find g(x), h(y) 2. Find f(x|y) 3.Evaluate P(1/4<x<1/2 | Y=1/3) in getting g(x) is this...

    Started by ARCHCOS‎, 03-09-2011 04:29 PM
    • Replies: 5
    • Views: 4,625
    03-10-2011, 04:10 PM Go to last post
  54. Exclamation HELP! Please! Test on Monday!

    :eek: Need help with these two. Have tried and tried and tried. Q1 Recent developments appear to make it possible for couples to dramatically...

    Started by Gia0614‎, 04-02-2006 12:08 AM
    • Replies: 1
    • Views: 4,621
    04-03-2006, 09:01 AM Go to last post
  55. probability confusion

    Hello everyone!!! I don't know if im experiencing a brain-fart these days, but I just can't figure this out. Here's a problem. I have more like...

    Started by speth‎, 10-27-2006 11:54 AM
    • Replies: 4
    • Views: 4,618
    10-31-2006, 10:34 PM Go to last post
  56. everything in life has a probablity of 50-50

    take a minute to think about this: everything in life has a probability of 50-50. it either happenes or it doesn't. I have never inderstood why...

    Started by love2laugh1410‎, 05-20-2007 08:07 PM
    • Replies: 3
    • Views: 4,617
    05-23-2007, 03:38 PM Go to last post
  57. Moment Generate function

    Suppose we were to play a game with the following rules. We pay seven dollars to play the game. We then flip a (possibly biased, probability of heads...

    Started by thenumber5‎, 12-06-2010 03:18 PM
    • Replies: 5
    • Views: 4,615
    12-06-2010, 04:27 PM Go to last post
  58. conditional expectation and variance

    Hi there, Suppose X~Exp(lam). We have a sample from X of size n. Knowing that the data follow the exponential diastribution, we fit the...

    Started by leo nidas‎, 02-09-2009 12:12 PM
    • Replies: 4
    • Views: 4,610
    02-09-2009, 01:54 PM Go to last post
  59. Probability & (possibly) Binomial Distribution

    Problem: A certain drug causes kidney damage in 1% of patients. Suppose the drug is to be tested on 50 patients. Find the probability that: (a)...

    Started by TwistedEsoterix‎, 10-18-2012 12:44 PM
    • Replies: 2
    • Views: 4,610
    10-18-2012, 06:11 PM Go to last post
  60. Poll Poll: Let's Make a Deal....

    Monty Hall presents you with 3 doors. Behind one of the doors is a new car. Behind the other 2 doors, there's nothing. You make your choice of...

    Started by JohnM‎, 10-05-2005 02:51 PM
    • Replies: 2
    • Views: 4,608
    10-17-2005, 10:14 AM Go to last post

+ Post New Thread
Page 15 of 91 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 65 ... 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