1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,867
+ Post New Thread
Page 35 of 91 FirstFirst ... 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 85 ... LastLast
Threads 2041 to 2100 of 5450

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: 30,277
    09-30-2005, 09:44 AM Go to last post
  1. probability question (re success)

    got the answer already. thanks! :)

    Started by bartowski‎, 04-21-2012 12:52 PM
    experiment, probability, success
    • Replies: 1
    • Views: 1,462
    04-21-2012, 02:31 PM Go to last post
  2. lottery probability

    got the answer already. thanks! :)

    Started by bartowski‎, 04-21-2012 12:02 PM
    lottery, probability
    • Replies: 1
    • Views: 1,892
    04-21-2012, 02:27 PM Go to last post
  3. Probability of rain on a weekend

    This is an open problem that we can choose how we want to answer. It is based on managing construction projects and determining the number of...

    Started by jkrob‎, 04-20-2012 01:25 PM
    • Replies: 1
    • Views: 1,652
    04-20-2012, 03:24 PM Go to last post
  4. 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: 1,732
    04-20-2012, 03:21 PM Go to last post
  5. Chi squared test, what does it say?

    Hi! I am trying to compare to groups with each other (conflict, no conflict ) in relation to health ( bad or good). The result shown in the...

    Started by Georges‎, 04-20-2012 06:14 AM
    • Replies: 0
    • Views: 1,290
    04-20-2012, 06:14 AM Go to last post
  6. Inverse Exponential Distribution & Linear Exponential Family

    Suppose X has an inverse exponential distribution with parameter λ. f(x) = λ exp(-λ/x) / x^2 , if x>0. This distribution is in the linear...

    Started by kingwinner‎, 04-20-2012 04:06 AM
    • Replies: 0
    • Views: 2,643
    04-20-2012, 04:06 AM Go to last post
  7. dice prob. of sum

    I have a question about a probability of sum in dices. lets say its a dice with 20 or more sides. for normal dice i just write for each sum of 2...

    Started by perchick‎, 04-19-2012 01:29 PM
    • Replies: 4
    • Views: 1,979
    04-20-2012, 02:49 AM Go to last post
  8. Random Variable homework question help

    The problem is: In a competition there are 12 canoes, 6 are red, 4 are green and 2 are yellow. We are interested in the random variable X being...

    Started by yellowdaisy‎, 04-20-2012 12:50 AM
    • Replies: 0
    • Views: 1,268
    04-20-2012, 12:50 AM Go to last post
  9. distribution

    Distribute six energy units to four different states, 0ε, 1ε, 2ε, 3ε, with the constraint that the total energy of the system is equal to 4ε which...

    Started by cw2020‎, 04-19-2012 03:19 PM
    distribution, energy, normal distribution, probability
    • Replies: 0
    • Views: 1,384
    04-19-2012, 03:19 PM Go to last post
  10. How to Calculate Probabilities for Ad Copy & Keyword Testing

    I work as a search engine marketer. I'm trying to take my knowledge to the next level by employing statistical tools in my work. A common...

    Started by jnscollier‎, 04-18-2012 10:39 PM
    • Replies: 1
    • Views: 2,281
    04-19-2012, 01:16 PM Go to last post
  11. wald test with two samples--testing whether two ML estimates are equal

    Hi, The Wald test can be used to compare the value of a maximum likelihood estimate to a proposed value. (with the assumption that the difference...

    Started by LVP‎, 04-18-2012 12:02 PM
    • Replies: 0
    • Views: 2,291
    04-18-2012, 12:02 PM Go to last post
  12. Lines of regression

    Im little confused with the following. there are 12 patients, each is assigned assigned an index I when first administered depending on the...

    Started by Hans Rudel‎, 04-18-2012 10:33 AM
    regression equation
    • Replies: 4
    • Views: 2,293
    04-18-2012, 12:01 PM Go to last post
  13. customer service problem

    N customers circulate in a closed system with two servers. In Server 1 and Server 2, service times are exponential with parameters 1 and 2,...

    Started by dalibocai‎, 04-17-2012 09:12 PM
    markov chains, stochastic process
    • Replies: 0
    • Views: 896
    04-17-2012, 09:12 PM Go to last post
  14. Standardising sample mean formula

    Hello, I need help with the following question: Prove, using the laws of expected value and variance, that the mean and variance of Z = ...

    Started by Erny‎, 04-17-2012 03:31 AM
    • Replies: 0
    • Views: 1,808
    04-17-2012, 03:31 AM Go to last post
  15. max sum

    Consider two discrete variables x and y each having three possible states, for example x, y ∈ { 0, 1, 2 } . Construct a joint distribution p(x, y)...

    Started by mathspycho‎, 04-16-2012 04:37 AM
    bayesian network, joint distribution, joint probability, max sum algorithm
    • Replies: 2
    • Views: 1,758
    04-16-2012, 10:43 PM Go to last post
  16. Help me get started setting up an elementary problem for use with a monte carlo sim

    I want to further understand monte carlo simulations. I have a business and I want to correctly set up a problem to find the likelihood of future...

    Started by dude‎, 04-13-2012 07:06 PM
    • Replies: 7
    • Views: 2,674
    04-16-2012, 01:31 PM Go to last post
  17. discrete approximation of a normal distribution

    Hi, i have a normal distribution \mu=10, \sigma=1 and need a discrete approximation of it in order to calculate e.g. P(X=8). How can i...

    Started by knild‎, 04-16-2012 09:33 AM
    • Replies: 5
    • Views: 7,342
    04-16-2012, 11:05 AM Go to last post
  18. probability of X consecutive heads vs selecting 3 cards from 7

    Hi, As far as i was aware both of these should be able to be solved in a similar manner yet the book im reading says otherwise. 1) 7 cards, 4...

    Started by Hans Rudel‎, 04-16-2012 10:34 AM
    geometric distribution, probability
    • Replies: 2
    • Views: 1,151
    04-16-2012, 10:58 AM Go to last post
  19. Expected time until absorption in a Markov chain with two absorbing states

    Dear all In my discrete time Markov chain (figure attached as attachment) two absorbing states namely "Isolate" and "Reset". The processes start...

    Started by arun227‎, 04-16-2012 01:45 AM
    • Replies: 1
    • Views: 2,004
    04-16-2012, 03:12 AM Go to last post
  20. Could someone please help? Probability of sampling error?

    This is one concept I cannot understand. I'm studying for a test and loathe the probability chapter. Here is the problem and I following all of the...

    Started by mnb124‎, 04-14-2012 05:56 PM
    • Replies: 12
    • Views: 5,581
    04-15-2012, 06:45 AM Go to last post
  21. Craps Probability

    I was a math major at Johns Hopkins, but for some reason this is giving me trouble. I want to know the probability of rolling EITHER a 4, 5, 9, or...

    Started by CaZeek‎, 04-15-2012 03:10 AM
    • Replies: 3
    • Views: 1,841
    04-15-2012, 05:36 AM Go to last post
  22. Individual parts combined to make a new one. Find mean and SD

    Hi all, I have found the mean and standard deviation of the length of a part using the probability density function I was given. Density...

    Started by jafar‎, 04-13-2012 11:44 PM
    • Replies: 3
    • Views: 2,560
    04-14-2012, 10:52 AM Go to last post
  23. dice probability

    Started by juantheron‎, 04-12-2012 03:20 AM
    • Replies: 5
    • Views: 1,649
    04-13-2012, 05:01 AM Go to last post
  24. probability

    7 digits from the numbers 1,2,3,...,9 are written in a random order. Find the probability that this 7 digit number is divisible by 9.

    Started by juantheron‎, 04-13-2012 03:58 AM
    • Replies: 1
    • Views: 1,731
    04-13-2012, 04:55 AM Go to last post
  25. Maximum likelihood estimator for a specific value of Y

    Let Y1,Y2,Y3,...,YN denote a random sample of size n from a Poisson distribution with mean lambda. a. Determine the MLE for P b. Obtain (as a...

    Started by APOCooter‎, 04-12-2012 02:53 PM
    • Replies: 1
    • Views: 2,517
    04-12-2012, 03:43 PM Go to last post
  26. Weird Hypothesis testing with normal distribution -> binomial distribution

    For a random sample of size n=64 from the Normal distribution with a standard deviation=1.22 known tset for a mean, of the hypotheses H0: mu=5...

    Started by APOCooter‎, 04-12-2012 02:30 PM
    • Replies: 0
    • Views: 1,722
    04-12-2012, 02:30 PM Go to last post
  27. Bimonial aggregation

    Hi, I'll try to keep this brief. I'm having troubles working with the binomial for a sporting event. Here's a totally simplified and fictional...

    Started by iambasil‎, 04-12-2012 05:21 AM
    • Replies: 5
    • Views: 2,031
    04-12-2012, 09:05 AM Go to last post
  28. Joint and Conditional Distributions

    I'm taking a calc-based Stats and Probability class, working on a problem that asks me to show, analytically, that if X,Y are independent binomials...

    Started by ragnar‎, 04-10-2012 02:37 AM
    • Replies: 2
    • Views: 2,217
    04-11-2012, 08:39 PM Go to last post
  29. need help on permutations

    I am trying to solve a problem that can be represented by rolling an n-sided die r times. I need to be able to figure out the probabilities of the...

    Started by cchriste‎, 04-11-2012 01:53 PM
    probability help
    • Replies: 1
    • Views: 1,414
    04-11-2012, 04:14 PM Go to last post
  30. Binomial + Binomial

    Hi, I'm having difficulty working with the binomial - specifically aggregating binomial distributions. Hoping somebody can tell me where I'm...

    Started by iambasil‎, 04-11-2012 02:41 PM
    binomial, distribution, probability, sport, statistics
    • Replies: 0
    • Views: 935
    04-11-2012, 02:41 PM Go to last post
  31. Question Chi Squared : Explaining the numbers

    Hello! Thank you in advance for your help and I hope I have posted this in the correct section. My question involves verbally explaining chi...

    Started by Noah41‎, 04-10-2012 06:50 AM
    • Replies: 2
    • Views: 4,406
    04-11-2012, 02:49 AM Go to last post
  32. Approximately chi-quadrat distributed

    Hi all, the definition of the chi-quadrat distribution is \chi^2_n \sim Z_1^2 + \dots + Z_n^2 with Z_i \sim N(0,1) My question: Are...

    Started by Jacov‎, 04-09-2012 09:10 AM
    • Replies: 6
    • Views: 1,982
    04-10-2012, 01:13 AM Go to last post
  33. When to investigate a surgeon for poor results

    I was at a talk today where they presented risk-adjusted results of a type of surgery. They had the results of many surgeons against one important...

    Started by SiBorg‎, 03-30-2012 01:32 PM
    • Replies: 3
    • Views: 2,084
    04-09-2012, 07:06 AM Go to last post
  34. Someone please help me with some stats questions

    I am gonna post the questions one by one and would appreciate if someone here could explain and solve them for me. All of them are MCQ's. The first...

    Started by saadt‎, 04-08-2012 04:18 PM
    • Replies: 4
    • Views: 2,503
    04-08-2012, 05:27 PM Go to last post
  35. Order statistics, sample median

    Hi! Can you help me with this: we have X=(X1, X2, ... Xn) - iid, Xi ~ N(m,1), I need to prove that distribution of med(X)-X(j) is the same as...

    Started by anja‎, 04-08-2012 04:29 PM
    median, order statistics
    • Replies: 4
    • Views: 4,136
    04-08-2012, 04:59 PM Go to last post
  36. Generalized multivariate t / Pearson Type VII distribution with vector d.f.?

    Does anyone know if there's such a thing as a multivarate t or Pearson Type VII distribution with vector-valued rather than scalar-valued degrees of...

    Started by Daniel Dvorkin‎, 04-07-2012 11:08 AM
    • Replies: 0
    • Views: 2,288
    04-07-2012, 11:08 AM Go to last post
  37. Probability Density

    The joint density function of X and Y is given by f (x, y) = xe^(-x(y+1)) x > 0, y > 0 (b) Find the density function of Z = XY. How is it...

    Started by pickboys‎, 03-29-2012 03:35 AM
    • Replies: 2
    • Views: 4,168
    04-05-2012, 05:40 PM Go to last post
  38. Help with derivation of probability density of {event generation} & {event detection}

    I would like to specify a new probability distribution that relates to an event of size M being produced by some process and subsequently detected....

    Started by chippy‎, 03-31-2012 10:31 AM
    combining variables, density function, probability distributions
    • Replies: 6
    • Views: 1,902
    04-05-2012, 05:24 PM Go to last post
  39. random walk on the integers

    consider a random walk on the integers such that P_{i,i+1} = p, P_{i,i-1} =q for all integers i and (0<p<1, p+q=1). Determine P^n_{00}. So...

    Started by LED2127‎, 04-04-2012 03:57 PM
    • Replies: 1
    • Views: 1,582
    04-05-2012, 02:06 PM Go to last post
  40. Conditional Probability: conditioning on intersection of two events

    Hi, I came across the following probability problem at my job, and would really appreciate any pointers. Let's assume that 70% of the visitors to...

    Started by misenial‎, 04-04-2012 03:59 PM
    • Replies: 1
    • Views: 3,040
    04-05-2012, 02:03 PM Go to last post
  41. Can't understand what this question means

    Let X and Y have exponential distributions Exp(3) (i.e, with the parameter 3) We assume that X and Y are independent. Let U=x+2Y and V=-x+Y....

    Started by saternal‎, 04-03-2012 08:35 AM
    • Replies: 5
    • Views: 1,983
    04-05-2012, 07:23 AM Go to last post
  42. Stochastic Processes- Renewal process

    I was hoping I could reach out to people on this forum to help me better understand my course material. My question is from A first course in...

    Started by LED2127‎, 03-27-2012 11:37 AM
    • Replies: 3
    • Views: 1,751
    04-03-2012, 10:19 AM Go to last post
  43. Martingale

    I must find an appropriate value so that the sequence constitutes a martingale wrt {X_n}. I have attached the problem so it is easier to read...

    Started by LED2127‎, 04-01-2012 01:34 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 3,945
    04-03-2012, 08:41 AM Go to last post
  44. Undergrad Research Ideas

    I'm an undergrad studying Linguistics and Computer Science, and I'm hoping to do some stats-related research this quarter. The problem is, my...

    Started by rightclick‎, 04-02-2012 06:42 PM
    ideas, research, topics, undergraduate
    • Replies: 1
    • Views: 1,535
    04-02-2012, 06:53 PM Go to last post
  45. Method of Moments question

    First, sorry if this is in the wrong forum. This is a general question. Given the pdf and the first theoretical moment (ie here its E(X) =...

    Started by kevinhk‎, 04-02-2012 02:29 PM
    • Replies: 3
    • Views: 2,263
    04-02-2012, 05:45 PM Go to last post
  46. null hypothisis and p value

    This is my question; A medical Researcher knows that the generally accepted level for Triglycerides in Adult Males is 110 mg/dl. Fearing that men...

    Started by bamfje@gmail.com‎, 04-02-2012 02:52 PM
    • Replies: 5
    • Views: 2,576
    04-02-2012, 03:45 PM Go to last post
  47. Another martingale question

    I have another martingale question. Let {X_n; n>=0} be a martingale with respect to {Y_n}. Prove for any set of integers k<=l<m that the...

    Started by LED2127‎, 04-02-2012 09:58 AM
    • Replies: 2
    • Views: 2,047
    04-02-2012, 10:10 AM Go to last post
  48. Can't seem to solve this p(x+y>1)

    Given f(x,y) = 3x/2 for 0<x<1 , -x<y<x Find P(x+y>1) .

    Started by saternal‎, 03-31-2012 04:43 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,469
    04-01-2012, 07:13 PM Go to last post
  49. Coin Fliipping or Rats at Vertices

    I'm aware that if you play the coin flipping game where the winner is the first to get a head the player who goes first has a 2/3 chance of winning....

    Started by Banz‎, 04-01-2012 12:14 PM
    • Replies: 1
    • Views: 1,958
    04-01-2012, 02:01 PM Go to last post
  50. School Lottery

    Hi I have been assigned the task of calculating the expected value (E(X)) for a school lottery from the perspective of a ticked buyer. This is a...

    Started by akkadak‎, 03-31-2012 09:20 AM
    • Replies: 0
    • Views: 1,149
    03-31-2012, 09:20 AM Go to last post
  51. I have a real stumper here

    I have a question that has stumped everyone I have asked. I wonder if anyone can help. Here is the scenario. Every time that team A plays on...

    Started by HoldenRg‎, 02-09-2012 06:13 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 3,995
    03-30-2012, 11:47 PM Go to last post
  52. White's Reality Check test

    Hi, I have a stock dataset for which I have found the "best" trading rule. Now, I need to find out the probability that this is the best trading...

    Started by andreea‎, 03-30-2012 01:33 PM
    • Replies: 1
    • Views: 3,692
    03-30-2012, 03:41 PM Go to last post
  53. Fano plane concept applied to lottery combinatorics

    I came across an interesting combinatorics optimisation description for 14numbers. Maybe someone good in combinatorics can expand this fano plane...

    Started by coolcat‎, 03-30-2012 11:46 AM
    • Replies: 2
    • Views: 2,476
    03-30-2012, 12:58 PM Go to last post
  54. limit of a probability

    Hi, I need to show that lim for n going to infinity of the probability of (n-1) C1>=C2+C3+...+Cn-1 =0. I have C1<C2<...<Cn-1<Cn. All Ci >0. I...

    Started by svde‎, 03-30-2012 03:17 AM
    limits, probability question
    • Replies: 1
    • Views: 2,476
    03-30-2012, 11:13 AM Go to last post
  55. I've been stuck for a while on this part. Help would be really appreciated!

    Let X1, . . . , Xn be IID Exponential(?) random variables. Use mgfs to find the distributionofY =X1 +...Xn.

    Started by Actuarial_Deepika‎, 03-30-2012 12:31 AM
    exponential distribution, mgf, probability distributions
    • Replies: 0
    • Views: 1,919
    03-30-2012, 12:31 AM Go to last post
  56. Smile Please help with hard (well for me at least) probability question!!

    Just can't get my head around this question and it's killing me. Any bit of help would be amazing! thank you :) In a Jackpot Lottery, 1500 numbers...

    Started by alisha‎, 03-29-2012 07:33 PM
    • Replies: 0
    • Views: 1,334
    03-29-2012, 07:33 PM Go to last post
  57. How can I calculate the probability in Section A of the attached image??

    Hello all! Please help me with this: I want to calculate the Probability in Section A .... Please see attached image. Assuming that Z (data...

    Started by af_231‎, 03-29-2012 06:24 AM
    • Replies: 3
    • Views: 2,939
    03-29-2012, 08:39 AM Go to last post
  58. math probability help

    post deleted

    Started by manoa‎, 03-28-2012 03:09 PM
    • Replies: 0
    • Views: 1,852
    03-28-2012, 03:09 PM Go to last post
  59. Likely hood of a specific score

    Im stuck on the following problem which is in my regression/prediction chapter. Ive summarised the question (note: if someone wants all the text,...

    Started by Hans Rudel‎, 03-28-2012 09:50 AM
    • Replies: 2
    • Views: 2,342
    03-28-2012, 10:04 AM Go to last post
  60. Probability of arthritis condition requiring medical treatment

    Hi everyone, I am trying to model the probability over time that a case of mild post-traumatic osteoarthritis in its early stages progresses to...

    Started by FuriousA‎, 03-06-2012 10:08 PM
    • Replies: 4
    • Views: 2,015
    03-28-2012, 01:34 AM Go to last post

+ Post New Thread

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