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# Forum: Probability

Probability course and homework discussion. Probability distributions. Probability theory, stochastic processes

1. ### 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)...

• Replies: 0
• Views: 30,175
09-30-2005, 09:44 AM
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...

• Replies: 4
• Views: 6,206
alf
11-09-2011, 11:41 AM
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...

• Replies: 3
• Views: 2,067
11-05-2013, 01:10 PM
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...

• Replies: 3
• Views: 4,158
03-25-2011, 12:13 AM
4. ### 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...

• Replies: 3
• Views: 3,736
02-06-2006, 12:59 PM
5. ### 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. ...

• Replies: 1
• Views: 2,442
10-26-2010, 02:11 PM
6. ### 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...

• Replies: 5
• Views: 2,466
11-10-2006, 05:06 PM
7. ### 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...

• Replies: 1
• Views: 1,769
08-04-2016, 08:27 PM
8. ### 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...

• Replies: 0
• Views: 2,269
04-24-2013, 11:04 PM
9. ### 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...

• Replies: 3
• Views: 2,770
03-09-2014, 11:27 AM
10. ### 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...

• Replies: 1
• Views: 1,932
BGM
11-02-2012, 10:29 PM
11. ### 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...

• Replies: 1
• Views: 1,132
BGM
11-25-2012, 02:51 PM
12. ### 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)?

• Replies: 4
• Views: 2,843
04-07-2011, 12:15 PM
13. ### 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 |...

• Replies: 0
• Views: 1,243
04-11-2015, 04:59 PM
14. ### 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...

• Replies: 2
• Views: 1,206
03-26-2014, 08:30 AM
15. ### 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...

• Replies: 0
• Views: 884
12-03-2011, 06:00 PM
16. ### 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...

• Replies: 0
• Views: 922
04-15-2014, 01:25 AM
17. ### 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...

• Replies: 4
• Views: 1,095
11-19-2012, 04:09 PM
18. ### 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...

• Replies: 2
• Views: 2,680
10-24-2012, 09:44 PM
19. ### 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...

• Replies: 1
• Views: 2,166
04-24-2011, 04:47 AM
20. ### 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 ...

• Replies: 1
• Views: 1,839
04-25-2011, 12:46 AM
21. ### 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 ...

• Replies: 1
• Views: 4,065
10-19-2008, 01:02 PM
22. ### 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...

• Replies: 0
• Views: 2,691
kia
04-01-2008, 03:49 AM
23. ### 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...

• Replies: 0
• Views: 1,233
edp
08-18-2015, 12:46 AM
24. ### 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...

• Replies: 12
• Views: 2,196
12-06-2014, 10:46 AM
25. ### 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}) =...

• Replies: 3
• Views: 4,167
BGM
06-19-2011, 08:20 AM
26. ### 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...

• Replies: 3
• Views: 1,169
12-07-2014, 11:08 AM
27. ### 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...

• Replies: 4
• Views: 4,913
09-26-2007, 09:29 AM
28. ### 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...

• Replies: 2
• Views: 1,469
10-13-2014, 04:10 PM
29. ### 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:...

• Replies: 6
• Views: 1,193
BGM
12-05-2014, 04:09 PM
30. ### 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...

• Replies: 4
• Views: 2,248
BGM
10-16-2012, 03:52 AM
31. ### 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...

• Replies: 9
• Views: 2,713
07-05-2012, 04:09 PM
32. ### 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...

• Replies: 2
• Views: 2,643
11-26-2009, 09:19 AM
33. ### 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...

• Replies: 1
• Views: 1,971
BGM
09-28-2010, 10:36 AM
34. ### 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...

• Replies: 1
• Views: 4,196
BGM
05-19-2010, 10:18 AM
35. ### 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...

• Replies: 2
• Views: 3,975
10-05-2016, 08:26 AM
36. ### 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....

• Replies: 0
• Views: 3,712
11-05-2012, 06:03 PM
37. ### 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...

• Replies: 6
• Views: 3,684
04-15-2010, 08:19 AM
38. ### 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...

• Replies: 0
• Views: 2,671
tup
10-22-2010, 01:08 PM
39. ### 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,...

• Replies: 2
• Views: 2,159
tup
10-22-2010, 12:39 PM
40. ### 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) ....

• Replies: 0
• Views: 1,958
11-16-2011, 05:36 AM
41. ### 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

• Replies: 1
• Views: 5,069
03-30-2011, 09:01 AM
42. ### 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...

• Replies: 3
• Views: 3,868
BGM
12-22-2011, 02:13 PM
43. ### 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...

• Replies: 1
• Views: 3,020
BGM
08-22-2011, 10:46 AM
44. ### Convolutions

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

• Replies: 1
• Views: 3,129
02-27-2010, 11:14 AM
45. ### 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...

• Replies: 1
• Views: 2,022
BGM
06-17-2011, 12:22 PM
46. ### 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...

• Replies: 0
• Views: 935
02-11-2013, 04:39 AM
47. ### 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 :)

• Replies: 3
• Views: 1,962
07-04-2013, 04:42 PM
48. ### 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...

• Replies: 1
• Views: 1,260
BGM
11-12-2015, 11:58 PM
49. ### 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...

• Replies: 1
• Views: 4,077
10-28-2007, 06:31 PM
50. ### 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...

• Replies: 2
• Views: 4,121
03-12-2010, 03:56 AM
51. ### 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...

• Replies: 0
• Views: 2,348
06-24-2011, 04:42 PM
52. ### 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...

• Replies: 1
• Views: 2,841
01-31-2010, 09:37 PM
53. ### 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...

• Replies: 2
• Views: 4,835
02-15-2009, 10:59 AM
54. ### 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....

• Replies: 6
• Views: 1,682
10-21-2015, 06:19 AM
55. ### [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?

• Replies: 17
• Views: 6,861
02-04-2012, 11:48 AM
56. ### 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...

• Replies: 1
• Views: 3,313
05-21-2008, 05:31 PM
57. ### 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...

• Replies: 2
• Views: 5,289
01-24-2010, 07:49 AM

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