1. Announcement:
05-10-2017
Views:
2,713
Page 15 of 92 First 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 ... Last
Threads 841 to 900 of 5461

# 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: 31,047
09-30-2005, 09:44 AM
1. ### Help Reviewing Central Limit Theorem Multiple Choice Questions

Hi All, Can someone help me review my answers below? This is a practice quiz and I am unable to get a good score. I am not sure which question I am...

• Replies: 2
• Views: 5,037
05-14-2014, 11:47 AM
2. ### Name of distribution with density proportional to incomplete gamma function

Hi, Does anyone know the name of the probability distribution with the following density function? f_X(x)=\frac{\Gamma}{\Gamma}, where x>0,...

• Replies: 2
• Views: 1,338
05-14-2014, 08:45 AM
3. ### Percentage with multiple tries problem

So I'm trying to figure out what the percentage of having a successful roll on any of three tries would be when the success rate for any single roll...

• Replies: 3
• Views: 1,880
05-11-2014, 01:09 PM
4. ### A simple probability theory question, but the answer may not be simple.

Hi, I have the following question. Suppose I draw a measure of 0<m<1 points uniformly without replacement from . What is the probability that less...

• Replies: 2
• Views: 1,502
BGM
05-11-2014, 11:45 AM
5. ### mean of 2 Poisson process variables

I have a Poisson process N(t)~Poiss(t*lambda), what is the mean of E(N(6)*N(10)) because it is a a Poisson process N(6) and N(10) are dependent (i...

• Replies: 4
• Views: 1,974
05-11-2014, 09:37 AM
6. ### Independence of Gaussian and non-Gaussian variables

Hi, If X is a Gaussian random variable, and Y is a non-Gaussian random variable, what are the necessary conditions for X and Y to be independent?...

• Replies: 2
• Views: 1,931
05-10-2014, 01:50 PM
7. ### Dice Probability (2d6, 3d6, 4d6)

I would like to find the probabilities of rolling a result using different numbers of six-sided dice. I am looking for the best way to figure out the...

• Replies: 2
• Views: 6,443
BGM
05-10-2014, 12:50 AM
8. ### Application of conditional probability with three variables

I have a question concerning the following problem: A hunter has a double-barrelled shotgun. The probability that at least one shot hits the...

• Replies: 0
• Views: 2,282
05-09-2014, 04:45 PM
9. ### joint probability with conditional

Hello, What is P(A|B, C)? I have a dataset and I want to estimate the mutual information of A|B and C. The formula for mutual information is ...

• Replies: 1
• Views: 1,401
xag
05-05-2014, 12:18 PM
10. ### Cumulative Beta Distribution Function Help

Hi everyone, I was wondering if someone could help me figure out how this function works. My problem is not that I need homework help, it's that...

• Replies: 13
• Views: 12,927
05-05-2014, 04:07 AM
11. ### Probability in an "on-off" cycle

A process runs in a cycle and has a wait time prior to and then after a period of activity. So say at time = 0 the process is "off" for a count of...

• Replies: 8
• Views: 2,184
05-03-2014, 10:43 AM
12. ### Quasi-poisson distribution, quantile function

Hello, I am searching for a closed form representation of the quantile function for the quasi-poisson distribution. Also, if anyone knows of any...

• Replies: 2
• Views: 1,739
05-03-2014, 08:32 AM
13. ### The auto-correlation of poissonian point process

I saw in a paper that the autocorrelation function of a poissonian point process is the following, R(t)=v^2+v*delta(t), written in Matlab style. The...

• Replies: 2
• Views: 6,819
04-29-2014, 02:00 PM
14. ### Statistics Probability question

At an allergist’s office, patients are screened for having a peanut allergy. The probability of having a peanut allergy is 0.023. The probability...

• Replies: 6
• Views: 1,988
04-29-2014, 11:46 AM
15. ### What does "Combined Estimates of the mean and standard deviation" mean?

Hi All! We have this exercise in class where we are given the table below: ---------------Estimate of the------Estimate of the...

• Replies: 0
• Views: 1,350
04-28-2014, 09:48 AM
16. ### probability question

Hello, I need help with the following problem I would appreciate it if you could help me. A supermarket sells 4 competitive items a, b, c and d....

• Replies: 4
• Views: 1,528
04-27-2014, 03:00 AM
17. ### help with a tricky question

hi guys, when i was looking for statistics exams to practice i found this problem at mit final exam back at 2004 the condition for failure of a...

• Replies: 6
• Views: 1,767
MFM
04-21-2014, 04:52 PM
18. ### Relating Type I and Type II Error to C-charts

Hello, I am trying to figure out how to relate type I and type II error calcuations to c-charts. Ive already calculated the 3 sigma control...

• Replies: 9
• Views: 2,622
04-21-2014, 03:25 PM
19. ### Probability

25 blocks arranged randomly in a circle: 15 red and 10 blue. X is the Number of blue blocks that has red blocks on both sides. What is the...

• Replies: 3
• Views: 1,456
04-20-2014, 10:40 AM
20. ### what is the most honest way to divide the prize?

Two men play some game several times till 10 wins. From the beginning each of them puts 500\$ for the final prize. At the score 7:4 they stopped...

• Replies: 2
• Views: 1,648
04-20-2014, 10:31 AM
21. ### What type of distribution

Hello I am a novice in probabilities and statistics and I am working on a data mining project I am currently analysing the reliability of medical...

• Replies: 3
• Views: 1,782
04-18-2014, 10:20 AM
22. ### moments vs parameters

Hi there, could you help me to understand the difference between moments and parameters of a distribution? I read definitions of moments like...

• Replies: 3
• Views: 3,850
BGM
04-17-2014, 11:35 AM
23. ### Probability growth with time

Hey, I am not an expert at probability. I've been wondering about a simple question that seem really hard for me to find an answer to simply by...

• Replies: 2
• Views: 1,881
04-17-2014, 11:34 AM
24. ### Probability that a normal random variable lies between 2 values

Hi all, I have been looking at this problem for a little while now and can't get anywhere with it. All of my notes relate to a variable lying between...

• Replies: 1
• Views: 1,403
04-15-2014, 09:49 AM
25. ### 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: 973
04-15-2014, 01:25 AM
26. ### Conditional Probability?

What is the probability on a single roll of a pair of dice, that the sum is 6, given that at least one die came up 1? I'm thinking that there are...

• Replies: 5
• Views: 1,769
04-12-2014, 11:20 PM
27. ### A bouncing ball is giving me fits.

Hi. Thank-you for reading this. My name's Philip Ripper. I'm not a student. I'm a curious person with a fairly poor math education. This is...

• Replies: 6
• Views: 1,692
04-11-2014, 08:53 PM
28. ### Seemingly unsolvable conditional probability

The following is a question that is likely to be appear on my exam on Friday (tomorrow) but contextualised into a different scenario. I'm having...

• Replies: 2
• Views: 1,096
04-10-2014, 09:39 AM
29. ### A probability question

Dear all This may be simple for you guys but I would be grateful for some advice on the following: A bus stop layby is only long enough for 2...

• Replies: 5
• Views: 1,641
BGM
04-09-2014, 07:50 AM
30. ### Probability Questions. Electrical Engineering.

I am having a difficult time with these questions. Can anyone help?

• Replies: 1
• Views: 1,987
04-08-2014, 03:49 PM
31. ### Extreme Value Theory with Gamma variables

Hey guys, I'm a bit of a statistics weakling so I could use some help on a problem I'm trying to solve. Basically I got N random gamma variables...

• Replies: 0
• Views: 1,589
04-08-2014, 02:27 PM
32. ### Probability in normal distribution

The weight of persons in a country is normally distributed with a mean equal to 70 kg and a standard deviation equal to 12 kg. a. What is the...

• Replies: 1
• Views: 1,156
04-08-2014, 07:58 AM

Please help me to solve a problem on conditional probability: 91 from 144 fishes in the river are polluted, only 6 fishes from these 144 are...

• Replies: 3
• Views: 1,546
BGM
04-05-2014, 03:11 PM
34. ### Binomial distribution problem.

I think this is a binomial distribution problem but I just don't know how to solve it. It gets a bit hard when I have to decide which is x, n or p ...

• Replies: 1
• Views: 2,846
BGM
03-31-2014, 11:54 AM
35. ### A question in order statistics of continuous type distribution

Let X1,X2,… be a sequence of random variables from a continuous type distribution and m and n be two integers such that m<n, and 2≤n−m. How can I...

• Replies: 1
• Views: 1,568
03-30-2014, 11:02 PM
36. ### Mental block on concept of PDF for a duration

I'm reading "A Tutorial on Hidden Markov Models and Selected Applications in Speech Recognition" and I am having a problem conceptually...

• Replies: 2
• Views: 1,959
03-26-2014, 08:25 PM
37. ### Limit in probability of (x-bar)^2 ?

Anyone have any idea how to prove or show what the limit in probability of (x-bar)^2 is? sample is drawn from CDF F(x)=1-x^-4

• Replies: 3
• Views: 2,692
03-26-2014, 07:31 PM
38. ### 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: 1,281
03-26-2014, 08:30 AM
39. ### How to determine distribution with no parameters

I'm confused by this question and I was hoping for some guidance some one to point me in the right direction Let X1.........Xn be a random sample...

• Replies: 3
• Views: 2,323
03-25-2014, 08:45 PM
40. ### Binomial Distribution in Excel

7. An emergency room administrator wants to know the proportion of emergency room patients who spend more than one hour waiting to be seen. He has...

• Replies: 1
• Views: 1,978
03-24-2014, 03:04 PM
41. ### Similar numbers in a data set

Hi guys, I am looking at a programming problem here, and would like to "deduce" a formula out of my problem. I have an array of n (known)...

• Replies: 2
• Views: 1,666
03-22-2014, 02:22 PM
42. ### Probability and coincidences help

Can someone please help in the breakdown of how I do this question I am completely lost and I am not sure how to even word the answers ...

• Replies: 0
• Views: 969
03-22-2014, 01:51 AM
43. ### Forecasting with several models

I would like to know how to deal with (presumed) independent models that provide different forecasted values. For example, let's assume that I...

• Replies: 0
• Views: 1,252
03-19-2014, 08:45 AM
44. ### Probability question making my brain hurt :p

"suppose you know that a friend of yours has two children and that at least one of them is a boy. One day, you visit your friend's house and his son...

• Replies: 1
• Views: 10,215
03-18-2014, 03:22 AM
45. ### binomial random variable

I'm having trouble understanding how I'm supposed to answer part a of this question I'm on. I was able to do b, c, d, and e though. Problem: The...

• Replies: 0
• Views: 3,283
03-17-2014, 02:46 PM
46. ### P/1 Actuarial exam practice

If anybody here is preparing for the p/1 actuarial exam then you may be interested in some practice exams I have prepared. The newest version can...

• Replies: 3
• Views: 2,623
03-17-2014, 10:52 AM
47. ### correlation matrix

E = integral o to 2i of the exp( ) = 2*pi*exp(i*x1(-m)) likewise for the x2 *x2 case = 2*pi*exp(i*x2*(-m)) For the other two parts E = I am...

• Replies: 1
• Views: 1,456
03-15-2014, 10:56 PM
48. ### Multivariate distributions that are 'closed' under marginalization?

a very, very nice property of the multivariate normal distribution is that any lower-dimensional margins are also multivariate (or univariate,...

• Replies: 4
• Views: 3,720
03-15-2014, 09:50 PM
49. ### variance of cosine functions

What are stronger inequality bounds than the chebyshev for variance?

• Replies: 0
• Views: 3,474
03-14-2014, 03:58 PM
50. ### Number of trials in zero-sum game

Hi all, this is my first post here! Forgive me if it's not in the right place. I have a question that's been bugging me because I tend to be...

• Replies: 5
• Views: 2,123
03-14-2014, 08:20 AM
51. ### First stats course. need help with this problem

a tree stand has 12 douglas firs, 10 maples, 3 hemlocks, and 7 cedars. if you randomly select 6 trees, what is the probability that at least 2 of...

• Replies: 5
• Views: 2,422
03-11-2014, 02:10 PM
52. ### Need some help on this question. Thanks

There are 12 balls in a bag that are numbered 1-12. I will choose one number (say I choose no. 5). Then four balls are picked at random. What is the...

• Replies: 3
• Views: 1,775
03-11-2014, 05:05 AM
53. ### Coin Flip and calling randomly

If there is a coin flip contest and there is a coin flipper continuously flipping the coin and there are three contestants 1. Always Calls Heads...

• Replies: 5
• Views: 1,707
03-10-2014, 08:47 AM
54. ### Z-values and probability

Suppose concentration of arsenic (in ppb) in groundwater sampled quarterly from a particular well can be modeled with a normal distribution with a...

• Replies: 0
• Views: 1,402
03-09-2014, 07:30 PM
55. ### Event Tree Probability Question

Event Tree Probability Question. One has tried looking this one up and Googling it, One is also dispraxic so while math can be tricky if one can...

• Replies: 0
• Views: 2,305
03-09-2014, 02:34 PM
56. ### 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: 2,978
03-09-2014, 11:27 AM

Page 15 of 92 First 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 ... Last

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.

Note: when sorting by date, 'descending order' will show the newest results first.