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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: 30,175
    09-30-2005, 09:44 AM Go to last post
  1. Consistent Estimator

    I'm new here so i'm not sure what is wrong with my tex (i cant get +)so I will write the correct information under my tex lines A balanced one way...

    Started by alf‎, 11-06-2011 07:10 PM
    • Replies: 4
    • Views: 6,206
    11-09-2011, 11:41 AM Go to last post
  2. Consistent estimator proof. plz help me out in this proof?

    I dont know how to prove this one: Let h(x) ia an even function, nondecreasing and non negative for x. Then, E goes to zero, for all θ implies that...

    Started by Hadeel_h‎, 11-05-2013 05:21 AM
    • Replies: 3
    • Views: 2,067
    11-05-2013, 01:10 PM Go to last post
  3. construction project probability

    A construction project is about 2 months away from the scheduled completion date. Based on the progress of the project to date, the contractor...

    Started by fool‎, 03-23-2011 06:11 AM
    • Replies: 3
    • Views: 4,158
    03-25-2011, 12:13 AM Go to last post
  4. Talking contingency table

    I am trying to build a contingency table but am confused. Here is the data I have: Probability that machine 1 will produce an irregular garment is...

    Started by MissNJ‎, 02-05-2006 05:35 PM
    • Replies: 3
    • Views: 3,736
    02-06-2006, 12:59 PM Go to last post
  5. Continious random variable- Uniform.

    I'm having trouble with some questions. Problem 1. If we have a continious random variable X that is uniformly distributed on the interval...

    Started by Michelle‎, 12-18-2005 07:49 PM
    • Replies: 7
    • Views: 3,975
    12-18-2005, 09:14 PM Go to last post
  6. Continous distribution question

    X ~ Uniform(0, 10). Find the distribution of Y = 3X + 5 I saw this in my classnotes, but my prof didn't do this during one of the lectures. ...

    Started by StatStudent3‎, 10-26-2010 01:20 PM
    • Replies: 1
    • Views: 2,442
    10-26-2010, 02:11 PM Go to last post
  7. continous random variables

    I need to find 1. the probability when X is less than or equal to 5. Given the following:- f(x) is 0.3 when x=0 0.014 when 0 is...

    Started by Naomikreinz‎, 10-30-2006 03:44 PM
    • Replies: 5
    • Views: 2,466
    11-10-2006, 05:06 PM Go to last post
  8. Question Continuity Correction and probability using standard normal distribution table

    I having trouble understanding the Z score along with getting my mean/SD with the below question. I need to know the break down of "how" rather than...

    Started by tessa1430‎, 08-02-2016 04:32 AM
    • Replies: 1
    • Views: 1,769
    08-04-2016, 08:27 PM Go to last post
  9. Continuity Correction Questions

    I understand the concept of continuity corrections for normal approximations, but I do not understand how to apply them. Most sites state that you...

    Started by FromHonoluluWithLove‎, 04-24-2013 11:04 PM
    1/2n, continuity correction
    • Replies: 0
    • Views: 2,269
    04-24-2013, 11:04 PM Go to last post
  10. Continuity correction, poisson

    Hi There is something that puzzles me. I tried calculating a Poisson probability. Exactly, and with the normal distribution, using both the...

    Started by Tarly‎, 03-09-2014 10:08 AM
    • Replies: 3
    • Views: 2,770
    03-09-2014, 11:27 AM Go to last post
  11. continuous and discrete variables with a copula?

    Hi, I have 3 correlated variables that I wish to model with a copula function. 2 of the variables are continuous and 1 is discrete. My...

    Started by bradyj2‎, 11-02-2012 07:29 AM
    • Replies: 1
    • Views: 1,932
    11-02-2012, 10:29 PM Go to last post
  12. Continuous distribution function

    I have a problem (actually two of them) where i am confused on what it requires. It states: Y is a continuous random variable on the interval...

    Started by tsamocki‎, 11-24-2012 05:40 PM
    • Replies: 1
    • Views: 1,132
    11-25-2012, 02:51 PM Go to last post
  13. continuous distributions

    hey.. im struck here f(x,y)=8xy 0<y<x<1 so now how do i take the limits to integrate when i have to calculate E(XY)?

    Started by sindhu88‎, 04-02-2011 08:31 PM
    • Replies: 4
    • Views: 2,843
    04-07-2011, 12:15 PM Go to last post
  14. Question Continuous joint entropy with fully dependent variable

    Consider a variable X with a continuous uniform distribution in the interval and a variable Y that is fully dependent on X, i.e., p(Y=y |...

    Started by ASML‎, 04-11-2015 04:59 PM
    dependence, entropy, joint distribution
    • Replies: 0
    • Views: 1,243
    04-11-2015, 04:59 PM Go to last post
  15. continuous joint p.d.f.

    Hi guys :yup: I am struggling with this probability problem, and I would really appreciate some help! If someone could check over what I have so far...

    Started by csc2iffy‎, 03-08-2012 04:08 AM
    • Replies: 3
    • Views: 2,614
    03-08-2012, 11:53 AM Go to last post
  16. Continuous Local Martingale Question

    I have attempted the following local martingale question. I'm not sure if the proof is correct. If M is in the space of continuous local...

    Started by chrishello‎, 03-25-2014 05:53 PM
    • Replies: 2
    • Views: 1,206
    03-26-2014, 08:30 AM Go to last post
  17. Continuous Multi-variablel Distribution question

    I'm doing some problems with multi-variable probability distributions and marginal distributions. I think I'm doing them right, but they don't feel...

    Started by APOCooter‎, 12-03-2011 06:00 PM
    • Replies: 0
    • Views: 884
    12-03-2011, 06:00 PM Go to last post
  18. Continuous probabibility distribution.

    Please help me with this problem, I don't understand it pretty well. The management of bidding of a company understands that the low bid X in...

    Started by camilaberas‎, 04-15-2014 01:25 AM
    • Replies: 0
    • Views: 922
    04-15-2014, 01:25 AM Go to last post
  19. Continuous probability problem

    Hello I have a probability problem, which I have solved, but I am not sure. I have a circle with radius r. I want to know what is the...

    Started by Yankel‎, 11-19-2012 03:03 PM
    • Replies: 4
    • Views: 1,095
    11-19-2012, 04:09 PM Go to last post
  20. Continuous Random Variable Question involving Height!

    Hi, I am working through the following question and understand all except the last question: Suppose that the height, in inches, of a 25-year-old...

    Started by S-C-3-1-3‎, 10-24-2012 06:41 PM
    • Replies: 2
    • Views: 2,680
    10-24-2012, 09:44 PM Go to last post
  21. continuous random variables help

    continuous random variables: basically, if you guys can answer this question for me and explain how its done I should be able to do the rest of...

    Started by shazakala‎, 04-23-2011 08:42 PM
    proportions, random variables
    • Replies: 1
    • Views: 2,166
    04-24-2011, 04:47 AM Go to last post
  22. continuous random variables two variables help.

    I need to know how to find two values that add up to 90% using only the standard deviation and the mean. please dont tell me something like ...

    Started by shazakala‎, 04-24-2011 04:50 AM
    • Replies: 1
    • Views: 1,839
    04-25-2011, 12:46 AM Go to last post
  23. Continuous Random Variance

    Assume that x is a binomial random variable with n=1000 and p=0.5 Find the following probabilities: P(x >500) So mu=np=1000x0.5= 500 ...

    Started by n77ler‎, 10-19-2008 09:44 AM
    • Replies: 1
    • Views: 4,065
    10-19-2008, 01:02 PM Go to last post
  24. continuous RV & probability Distributions

    :) hi all i m asking for a help actualy i realy didnt understand how does continuous random variable function can anyone pls explain me this or just...

    Started by kia‎, 04-01-2008 03:49 AM
    • Replies: 0
    • Views: 2,691
    04-01-2008, 03:49 AM Go to last post
  25. Contribution to a Probability

    Hi All, I'm sorry that this question is trivial but I'm afraid I've forgotten how to solve simple probability and statistics problem :( Say...

    Started by edp‎, 08-18-2015 12:46 AM
    • Replies: 0
    • Views: 1,233
    08-18-2015, 12:46 AM Go to last post
  26. Convergence

    If Z_n = \frac{1}{n}*\sum_{i=1}^nX_i^2 where X_i=N(\mu,\sigma^2) 1) Show that Z_n \rightarrow^p \mu^2+\sigma^2(convergence in probability) I...

    Started by askazy‎, 12-03-2014 04:50 PM
    • Replies: 12
    • Views: 2,196
    12-06-2014, 10:46 AM Go to last post
  27. convergence and expectation

    Let X_1, X_2, ... be independent and identically distributed random variables with the characteristic function \varphi_X(t) = E(e^{itx}) =...

    Started by madara123‎, 06-18-2011 09:17 PM
    • Replies: 3
    • Views: 4,167
    06-19-2011, 08:20 AM Go to last post
  28. Convergence in Distribution

    If X_n is a sequence of random variables independent and X_n is Binomial(n,p) with 0<p<1 and either T_n=\frac{X_n}{n} for all n 1) Show that...

    Started by askazy‎, 12-06-2014 05:50 PM
    • Replies: 3
    • Views: 1,169
    12-07-2014, 11:08 AM Go to last post
  29. Convergence in probability

    Hi, Can you please help me with the following question? Any hints, ideas would be much appreciated. Suppose that the sequence Xn converges to...

    Started by alien‎, 09-24-2007 05:50 PM
    • Replies: 4
    • Views: 4,913
    09-26-2007, 09:29 AM Go to last post
  30. Convergence in Probability

    Hello all. I have a two statements. One says -\frac{1}{T} \sum_{t=1}^T X_t \rightarrow a in probability as T \rightarrow \infty The...

    Started by sacamantecas‎, 10-13-2014 03:42 PM
    • Replies: 2
    • Views: 1,469
    10-13-2014, 04:10 PM Go to last post
  31. Convergence in probability

    If Z_n=\frac{1}{n}\sum_{i=1}^nX_i^2 and W_n=\frac{1}{n}\sum_{i=1}^n(X_i-\bar{X})^2 Show that V_n=Z_n - W_n \rightarrow^p \mu^2 What I think:...

    Started by askazy‎, 12-05-2014 11:21 AM
    • Replies: 6
    • Views: 1,193
    12-05-2014, 04:09 PM Go to last post
  32. convergence in probability and strong convergence in the discrete case

    Show that if you have convergence in probability, then you also have strong convergence in the discrete case. I know that the discrete case means...

    Started by phychoflip29‎, 10-15-2012 07:48 PM
    • Replies: 4
    • Views: 2,248
    10-16-2012, 03:52 AM Go to last post
  33. convergence in probability help

    Hey guys, I'm hoping that one of you smarter than me can help me with understanding the concept of convergence in probability. I'm currently using...

    Started by Link‎, 07-05-2012 12:18 PM
    • Replies: 9
    • Views: 2,713
    07-05-2012, 04:09 PM Go to last post
  34. Convergence of random variables

    I was reading some proofs about the convergence of random variables, and here are the little bits that I couldn't figure out... 1) Let X_n be a...

    Started by kingwinner‎, 11-24-2009 12:56 PM
    • Replies: 2
    • Views: 2,643
    11-26-2009, 09:19 AM Go to last post
  35. Convergence of random variables

    Hi guys, I have two questions that I don't really know how to approach. 1. Consider a random variable Zn = max (1<= k <= n) Xk where Xk is...

    Started by Dibbs‎, 09-28-2010 07:56 AM
    • Replies: 1
    • Views: 1,971
    09-28-2010, 10:36 AM Go to last post
  36. Convergence problem in probability

    Hi, the following question keeps coming up in recent year's exam and i'm unsure how to do it fully: Q. If the sequence of random variables...

    Started by qwertykeyboards‎, 05-19-2010 05:44 AM
    • Replies: 1
    • Views: 4,196
    05-19-2010, 10:18 AM Go to last post
  37. Convergence question

    X1, X2,.......Xn is a sequence of random variables. Show that Xn converges to b in quadratic mean if and only if The limit (n approaching...

    Started by greg6363‎, 10-04-2016 08:31 AM
    • Replies: 2
    • Views: 3,975
    10-05-2016, 08:26 AM Go to last post
  38. Convergence rate of Bates distribution to Normal distribution

    Hello, I am working on an illustration of approximating one distribution with another. Specifically, I am approximating a sample mean of N i.i.d....

    Started by xygorn‎, 11-05-2012 06:03 PM
    • Replies: 0
    • Views: 3,712
    11-05-2012, 06:03 PM Go to last post
  39. convergence short question

    Hi there, The "n" below is a subscript If Xn is a sequence of random variables and Xn converges to zero almost surely. Can we say something...

    Started by leo nidas‎, 03-30-2010 04:47 AM
    • Replies: 6
    • Views: 3,684
    04-15-2010, 08:19 AM Go to last post
  40. converges almost surely

    I need to use this lemma for my prove, and I dont know how to prove this lemma. "X_n \rightarrow 0 a.s iff for all \epsilon > 0, P(|X_n| > \epsilon...

    Started by tup‎, 10-22-2010 01:08 PM
    • Replies: 0
    • Views: 2,671
    10-22-2010, 01:08 PM Go to last post
  41. converges in prob

    Let X_1, X_2, ... be independent with P(X_n = 1) = p_n and P(X_n = 0) = 1- p_n. Show that (i) X_n \rightarrow 0 in probability iff p_n \rightarrow 0,...

    Started by tup‎, 10-22-2010 10:04 AM
    • Replies: 2
    • Views: 2,159
    10-22-2010, 12:39 PM Go to last post
  42. converting a frequency matrix to a transition probability matrix

    Hi there, I have speed and power in two columns. Each speed, power point is a referred to as a state. I've created a frequency matrix showing...

    Started by bradyj2‎, 09-09-2011 05:38 AM
    • Replies: 0
    • Views: 3,954
    09-09-2011, 05:38 AM Go to last post
  43. Converting a Wide Sense CycloStationary process into a Wide Sense Stationary process

    Hello everybody :) I have a bit of a problem with understanding the conversion from a WSCS process X(t) to a WSS process Y(t) = X(t - \Delta) ....

    Started by Alex On The Moon‎, 11-16-2011 05:36 AM
    • Replies: 0
    • Views: 1,958
    11-16-2011, 05:36 AM Go to last post
  44. converting geometric distribution to the exponential family

    converting geometric distribution to the exponential family f(x,p)=p^x*(1-p) does anyone know how to do this

    Started by mitz‎, 03-30-2011 01:53 AM
    • Replies: 1
    • Views: 5,069
    03-30-2011, 09:01 AM Go to last post
  45. Converting instantaneous Reliability at time (t) to normalized failure rate (fpmh)

    Given the reliability at 2100 hours =0.992, then lambda(2100 hours) = -Ln(0.992)=0.008. I need to convert the hazard rate (lambda) for 2100 hours to...

    Started by halfdome‎, 12-21-2011 09:04 PM
    • Replies: 3
    • Views: 3,868
    12-22-2011, 02:13 PM Go to last post
  46. Convolution and conditionning: S=X+Y X=two point distribution Y=Normal

    Hello, can anyone help to find the conditional distribution of X given S if S=X+Y X is a r.v. {0,1} 0 with probability p and 1 with probability...

    Started by cactusenok‎, 08-22-2011 09:39 AM
    • Replies: 1
    • Views: 3,020
    08-22-2011, 10:46 AM Go to last post
  47. Convolutions

    Can anyone explain convolutions to me? I've been staring at page 302 of this book (sum of 2 uniform random variables):...

    Started by sweetpotatofry‎, 02-25-2010 10:04 PM
    • Replies: 1
    • Views: 3,129
    02-27-2010, 11:14 AM Go to last post
  48. Convolutiosn and the Standard Gaussian distribution

    Hello, my question ; Suppose X1 and X2 are independent random variables, each with the standard gaussian distribution. Compute, using...

    Started by stukbv‎, 06-13-2011 12:50 PM
    • Replies: 1
    • Views: 2,022
    06-17-2011, 12:22 PM Go to last post
  49. Copula decomposition

    Hello, I need to estimate correlations in the conditional distribution p(y|theta,eta) using copula. Theta is a scalar and eta is 3x1 vector. For...

    Started by Marek‎, 02-11-2013 04:39 AM
    • Replies: 0
    • Views: 935
    02-11-2013, 04:39 AM Go to last post
  50. correct probability distribution

    stupid question i know, but when a question asks me to identify the correct method of PB what exactly do i have to do? thanks :)

    Started by worldofquery‎, 05-19-2013 02:42 AM
    • Replies: 3
    • Views: 1,962
    07-04-2013, 04:42 PM Go to last post
  51. correct update of bayesian posteriors

    the question looks a bit artificial but I simply tried to get rid of useless details. There are two persons, A, and B. they each got a number, a...

    Started by David Pekker‎, 11-12-2015 12:29 PM
    • Replies: 1
    • Views: 1,260
    11-12-2015, 11:58 PM Go to last post
  52. Corrected significance level in Tukey HSD post-hocs?

    Dear all, I have a question that is really bugging me: I'm testing if seed set in one plant species is impacted by the deposition of pollen...

    Started by crazy_man‎, 10-24-2007 08:33 AM
    • Replies: 1
    • Views: 4,077
    10-28-2007, 06:31 PM Go to last post
  53. correlated binary variables

    I have the following problem: let X = {x_i}, and Y = {y_i} be two vectors of binary variables with n elements (taking the value 0 or 1 with some...

    Started by torkel‎, 03-11-2010 02:01 PM
    • Replies: 2
    • Views: 4,121
    03-12-2010, 03:56 AM Go to last post
  54. Correlated standard bivariate normal probabilities

    Hi, Suppose that X,Y are bivariate standard normal with correlation rho. I am interested in calculating P for arbitrary z. Clearly for rho=0...

    Started by MattS‎, 06-24-2011 04:42 PM
    • Replies: 0
    • Views: 2,348
    06-24-2011, 04:42 PM Go to last post
  55. Correlating time series data between sources

    I have data from a remote environmental station, collected hourly over a period of months. Extreme outliers indicated periodic bad data and so the...

    Started by SlideRule‎, 01-31-2010 03:00 PM
    • Replies: 1
    • Views: 2,841
    01-31-2010, 09:37 PM Go to last post
  56. correlation and covariance

    1) Suppose that two random variables X & Y are jointly distributed according to the pdf f(x,y)=8xy , 0<=y<=x<=1. What is the correlation coefficient...

    Started by thandu3‎, 02-14-2009 11:16 PM
    • Replies: 2
    • Views: 4,835
    02-15-2009, 10:59 AM Go to last post
  57. Correlation between data and people

    Hi all, I need your help for this problem. I have to understand the probability to identify the person of a team gives me the product dirtier....

    Started by leomac‎, 10-13-2015 04:56 AM
    • Replies: 6
    • Views: 1,682
    10-21-2015, 06:19 AM Go to last post
  58. [SOLVED] Correlation between two normal variables ...

    Suppose A ~ N (0,a), B ~ N (0,b-a), C = A + B what is the expression for the correlation between A and C?

    Started by BigBugBuzzz‎, 02-03-2012 12:37 PM
    2 Pages
    1 2
    correlation, normal random variables
    • Replies: 17
    • Views: 6,861
    02-04-2012, 11:48 AM Go to last post
  59. correlation coefficient

    Let X1 and X2 be independent random variables with EXi =Ui (where U is actually Mu) and Var(Xi) =Sigma^2 where sigma(i)^2 >0 and i=1,2,3..... Let Y1...

    Started by noel_gallagher‎, 05-21-2008 04:59 PM
    • Replies: 1
    • Views: 3,313
    05-21-2008, 05:31 PM Go to last post
  60. correlation coefficient

    hi another exam preparation question: let x1..xn be random varibale independent and with same dist. they have exp. u and variance v. let m be a...

    Started by zhenyazh‎, 01-24-2010 07:12 AM
    • Replies: 2
    • Views: 5,289
    01-24-2010, 07:49 AM Go to last post

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