1. 10-14-2010
    Views:
    18,898
+ Post New Thread
Page 1 of 81 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... LastLast
Threads 1 to 60 of 4827

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 10:44 AM
    • Replies: 0
    • Views: 11,640
    09-30-2005, 10:44 AM Go to last post
  1. Question Confidence Intervals

    Hi I am new to stats and really spending lots of time on concepts which I can build on, I thought I was fairly comfortable with confidence...

    Started by Golf39‎, 12-16-2014 05:53 AM
    • Replies: 4
    • Views: 164
    Today, 07:12 AM Go to last post
  2. Dice probability problem

    Hi everyone, I have a simple dice problem but am having trouble with it because it's hard to google something like this. Here it is... I have...

    Started by benali‎, 12-15-2014 07:39 PM
    • Replies: 2
    • Views: 132
    12-16-2014, 08:56 AM Go to last post
  3. I can't undertand two problem..

    Hello everyone, I can't solve 2 problem during 4 hours.... Suppose that a tray of eggs consists 10 egg and there are 10 trays(i.e. there is 100...

    Started by doggra‎, 12-15-2014 05:50 AM
    • Replies: 3
    • Views: 134
    12-15-2014, 11:40 AM Go to last post
  4. red balls and blue balls

    Hi there everyone I'm a complete newbie to probability and currently taking a foundation degree at Uni of which statistics is one of my modules. I...

    Started by timlazisa‎, 12-10-2014 01:01 PM
    • Replies: 9
    • Views: 245
    12-14-2014, 07:40 AM Go to last post
  5. Tree diagram

    trying to complete this mock test and paper I don't get this at all can anyone help please? I have attached a pdf of the paper and 3 questions.

    Started by timlazisa‎, 12-12-2014 04:44 PM
    • Replies: 0
    • Views: 118
    12-12-2014, 04:44 PM Go to last post
  6. confidence levels on 2d \chi^2 grid, where the minimum \chi^2 is not near 1.

    Hallo everybody! I have the following problem: I obtained a 2D grid of reduced \Chi^2 fits, where the the minimum \Chi^2 is far from unit (1)....

    Started by Trifonov‎, 12-12-2014 04:38 AM
    • Replies: 0
    • Views: 138
    12-12-2014, 04:38 AM Go to last post
  7. A couple Normal Distribution Probability problems

    I've been trying to figure out the answer to these two problems for weeks, but I can't seem to figure out how to do them. Please let me know if you...

    Started by meaght12‎, 12-11-2014 02:19 PM
    • Replies: 7
    • Views: 238
    12-11-2014, 04:58 PM Go to last post
  8. Probability problem

    An experiment consists of flipping one coin four times. Give a pair of events that are independent and a pair of events that that are dependent, and...

    Started by BubblesMagee‎, 12-11-2014 03:12 AM
    • Replies: 0
    • Views: 91
    12-11-2014, 03:12 AM Go to last post
  9. Distribution of a function of random variables problem

    First off, I'm new to this forum and Probability and Statistics. I'm a junior in college and currently taking my first course in this subject and...

    Started by tnvy04‎, 12-10-2014 10:07 PM
    • Replies: 1
    • Views: 114
    12-10-2014, 11:19 PM Go to last post
  10. Equal chance of random selection when halves of set are balanced?

    Design: For 18 trials numbers (either 0 or 1) are randomly selected, a random portion of the first 9 are 0 and the last 9 are set as the opposite...

    Started by Oeei922331100‎, 12-10-2014 02:34 PM
    combinatorics, permutation, probabilistic sampling, probabilities, random
    • Replies: 0
    • Views: 85
    12-10-2014, 02:34 PM Go to last post
  11. Question: Determining percentage of probability

    Hello, I'm in the middle of working on an assignment that involves determining probability. I wanted to see if I am on the right track. Any help...

    Started by sditizio‎, 12-09-2014 12:07 AM
    • Replies: 1
    • Views: 128
    12-09-2014, 01:34 AM Go to last post
  12. probability function of sum of multiple normal distributions

    I have four normally distributed random variables which may/may not be correlated. I want to find the probability distribution function of the...

    Started by Sf26‎, 12-08-2014 01:30 PM
    • Replies: 4
    • Views: 200
    12-08-2014, 02:50 PM Go to last post
  13. Central Limit Theorem

    If X is a Gamma(n,1). For which values of n we have P(|\frac{X}{n}-1|>0.01)<0.1 If n=n_0 is the first value of n that satisfies the above equation,...

    Started by askazy‎, 12-06-2014 10:55 AM
    • Replies: 3
    • Views: 210
    12-08-2014, 06:25 AM Go to last post
  14. 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: 230
    12-07-2014, 11:08 AM Go to last post
  15. Markov Inequality

    If X_1,X_2,X_3...X_{20} are independent random variables with common distribution Poisson(1). Find with markov inequality a upper limit for...

    Started by askazy‎, 12-06-2014 03:00 PM
    • Replies: 6
    • Views: 149
    12-06-2014, 04:58 PM Go to last post
  16. Binomial Test in Excel

    What is the probability of getting AT LEAST 79 out of 90 correct on a True or False test if you are guessing on every question? I think I need to...

    Started by bengalgirl‎, 12-06-2014 04:46 PM
    binomial distribution, excel
    • Replies: 0
    • Views: 153
    12-06-2014, 04:46 PM Go to last post
  17. Computing MLE estimate

    So I have so i'm stuck at taking the log :mad: can somoene help me ?

    Started by studentbelg‎, 12-01-2014 03:33 PM
    • Replies: 2
    • Views: 233
    12-06-2014, 12:39 PM Go to last post
  18. 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: 367
    12-06-2014, 10:46 AM Go to last post
  19. Strong Law of Large Numbers

    If X_n is a sequence of random variables and Cov(X_i,X_j)=0 for all i,j and Var(X_j)\leq c for all j. Show that X_n satisfies the strong law of large...

    Started by askazy‎, 12-05-2014 07:13 PM
    • Replies: 2
    • Views: 194
    12-06-2014, 10:46 AM Go to last post
  20. A Couple of Questions Re: Birth and Death Processes

    Hello, I have a few homework questions regarding birth & death processes (CTMCs) that I'm having trouble solving: 1) Suppose a CTMC has a death...

    Started by jli‎, 12-06-2014 04:18 AM
    • Replies: 0
    • Views: 148
    12-06-2014, 04:18 AM Go to last post
  21. Joint Normal distributed independent random variable question

    Sam's bowling scores are approximately normally distributed with mean 110 and standard deviation 11, while John's scores are normally distributed...

    Started by doublea500‎, 12-05-2014 03:07 PM
    • Replies: 1
    • Views: 183
    12-05-2014, 05:24 PM Go to last post
  22. 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: 214
    12-05-2014, 04:09 PM Go to last post
  23. Uniform Random Variables Joint Distribution Queston

    x and y are uniformly and independently distributed over the interval . Find the probability that |x−y|, the distance between x and y, is less than...

    Started by doublea500‎, 12-05-2014 01:24 PM
    • Replies: 2
    • Views: 194
    12-05-2014, 03:04 PM Go to last post
  24. Can somebody help me look this over to verify if it is correct?

    I have this project I am working on. I want to make sure it is correct. My professor helped me with part of it in the middle, and I had difficulty...

    Started by bershe‎, 12-05-2014 08:09 AM
    • Replies: 0
    • Views: 141
    12-05-2014, 08:09 AM Go to last post
  25. Probability of k pairs of birthdays in a group of n people

    Could somebody please tell me the formula for computing the probability that exactly k pairs will have the same birthday out of a group of n people? ...

    Started by Leo Simon‎, 11-30-2014 05:50 PM
    birthday problem
    • Replies: 10
    • Views: 424
    12-02-2014, 10:24 AM Go to last post
  26. Conditional Variance

    Hi, I have difficulty understanding the definition of conditional variance as: var(X|Y) = E)**2 | Y]. Given the definition of variance of a...

    Started by fifosm‎, 11-09-2014 04:25 PM
    conditional variance
    • Replies: 7
    • Views: 365
    12-01-2014, 10:12 AM Go to last post
  27. Is this solvable?

    Is this a solvable problem? Can someone please explain one way or the other…here goes: There are two parking lots in a bad part of town: Lot A and...

    Started by StatisticsChallenged‎, 11-30-2014 10:58 PM
    • Replies: 1
    • Views: 193
    11-30-2014, 11:48 PM Go to last post
  28. Simple prob question

    Hey all, I have a very simple Q and would appreciate if you could confirm the right answer with me. Scenario: I am playing the lottery and have...

    Started by ValentinK‎, 11-29-2014 06:44 PM
    • Replies: 2
    • Views: 223
    11-30-2014, 08:00 AM Go to last post
  29. Secret santa problem

    Hi everybody At my work we just started a secret santa game. We are 6 and we ended up getting an outsider to mix 6 pieces of paper, each with one...

    Started by Hugosson‎, 11-27-2014 11:06 AM
    • Replies: 5
    • Views: 299
    11-28-2014, 06:26 PM Go to last post
  30. Street con, probability problem from my statistics class.

    Hello our teacher recently gave us a problem to take home and work on and I think I have most of it figured out but I would like some input and help....

    Started by sergio1er‎, 11-25-2014 12:28 AM
    • Replies: 1
    • Views: 272
    11-25-2014, 04:35 PM Go to last post
  31. Question Homework help with Confidence Intervals & Estimating Probability Proportions?

    I'm super lost on a few sets of my statistics homework and wondering if anyone can walk me through this so I can finish the rest of the questions as...

    Started by bjk8090‎, 11-24-2014 11:33 AM
    • Replies: 2
    • Views: 189
    11-24-2014, 02:46 PM Go to last post
  32. True odds vs Bookmaker odds?

    Hello, I'm new to the forum and very excited to be here. However I have a question that brought me here. i attach a picture to show more clearly what...

    Started by VaBanque‎, 11-06-2014 02:01 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 488
    11-24-2014, 01:55 AM Go to last post
  33. When does the Normal Distribution arise?

    Hello guys, Studying the multivariate normal distribution (and the univariate one as well), I found in Muirhead (1982) that the normal distribution...

    Started by Axs_Souza‎, 11-23-2014 04:57 PM
    normal distribution, random effects
    • Replies: 1
    • Views: 240
    11-23-2014, 05:19 PM Go to last post
  34. Distribution

    Hello, I having doubts on this issue 1) If X~Gamma(a,B) and Y~Beta(γ,B-γ), respectively with B>= 0 and γ>= 0, such that γ <= B. Which...

    Started by askazy‎, 11-21-2014 09:11 AM
    • Replies: 10
    • Views: 421
    11-22-2014, 04:56 PM Go to last post
  35. Hard probability question/game-binomial dist.

    Consider 50 people and series of 10 rooms. Each room has, for example, 5 doors that will open to the next room with known (totally known, including...

    Started by bhr23‎, 11-22-2014 09:58 AM
    binomial, game
    • Replies: 0
    • Views: 184
    11-22-2014, 09:58 AM Go to last post
  36. Combination and Permutation question

    Hi guys, I'm new to the field of probability and statistics, I have a question that I can't seem to be able to solve, it would be a great help if you...

    Started by devick‎, 11-16-2014 07:57 AM
    • Replies: 2
    • Views: 348
    11-20-2014, 11:03 PM Go to last post
  37. Expected Value and Variance

    If a number X is chosen at random from the integers 1, 2, . . . , 100, what is the expected value and the variance of X? Expected value is just...

    Started by panda‎, 11-14-2014 09:35 PM
    • Replies: 3
    • Views: 306
    11-15-2014, 07:12 PM Go to last post
  38. Stats help

    A biology student wishes to assess the amount of calories in a certain brand of chocolate energy bars. A sample of bars is taken and the calories...

    Started by pankti_ptl‎, 11-13-2014 02:12 PM
    • Replies: 1
    • Views: 311
    11-14-2014, 05:32 PM Go to last post
  39. Maximum likelihood estimation of transition probabilities

    Hi, I'm new to Markov chains but have been advised by a colleague to use this approach for my latest study. I have a basic understanding of the...

    Started by freofan‎, 11-13-2014 04:27 AM
    markov, maximum likelihood, transition matrix
    • Replies: 0
    • Views: 156
    11-13-2014, 04:27 AM Go to last post
  40. Calculating probability of at least/exactly X when rolling 2 n-sided dice

    Hi, Psychology student struggling with probabilities here. Can anyone please tell me how do I calculate: 1) The probability of getting at...

    Started by replica‎, 11-12-2014 07:30 PM
    • Replies: 0
    • Views: 33
    11-12-2014, 07:30 PM Go to last post
  41. Probability - Law of multiplication?

    I'm reading about probability and encountered this problem: http://imgur.com/6xTM9Z1 (I guess the answer of a is 1-0,37=0,63 which is the...

    Started by Concret‎, 11-12-2014 10:07 AM
    • Replies: 0
    • Views: 194
    11-12-2014, 10:07 AM Go to last post
  42. "Show that fY|X(y) is a density function of a true probability distribution"

    Where do I begin?? The course I'm taking is focusing heavily on proofs like this, and I'm studying it at a distance so my opportunity to ask...

    Started by xandalorian‎, 11-11-2014 12:20 AM
    • Replies: 3
    • Views: 231
    11-12-2014, 05:37 AM Go to last post
  43. Post Probability Help

    Hello! Taking an introductory course on statistics in college. Confused about one question. It reads: The IRS reports that 15% of the tax returns...

    Started by glporter‎, 11-12-2014 12:28 AM
    math, probability, probability model
    • Replies: 1
    • Views: 186
    11-12-2014, 02:10 AM Go to last post
  44. Triple Coupon Collector's Problem

    I've been looking around for solutions to a certain variation of the Coupon Collector's Problem, but I haven't been able to find anything (and I'm...

    Started by Eyks‎, 11-11-2014 01:23 AM
    • Replies: 1
    • Views: 184
    11-11-2014, 03:29 AM Go to last post
  45. Problem:Finding n-stickers

    Hello, we ( students ) were given a very randomly homework. I say randomly because we've been solving PROBABILITY tasks and now suddenly we were...

    Started by imartinmkd‎, 11-09-2014 09:32 PM
    • Replies: 7
    • Views: 277
    11-10-2014, 01:08 PM Go to last post
  46. I am not sure how to solve for a probability when N is not given (beginner help).

    
I am having the most trouble with part "a)" but I am comparing the two answers so if you feel inclined to discuss part "b)" as well, I would...

    Started by annaml‎, 11-10-2014 12:02 PM
    • Replies: 6
    • Views: 226
    11-10-2014, 12:31 PM Go to last post
  47. Cumulative Distribution

    Can anyone explain how to do this problem: Let X be a random variable uniformly distributed in the interval (0, 1). Find the cumulative distribution...

    Started by panda‎, 11-09-2014 05:45 PM
    • Replies: 2
    • Views: 197
    11-09-2014, 06:25 PM Go to last post
  48. Poisson Distribution

    I figured out that this is Poisson distribution with a parameter λ >0 P(X = k) = ((λ^k)/k!)e^−λ , k = 0, 1, . . . , And now I want to show that...

    Started by panda‎, 11-08-2014 10:27 PM
    • Replies: 3
    • Views: 227
    11-09-2014, 05:42 PM Go to last post
  49. Independent Variables and Distribution

    I am having a lot of trouble starting this problem. Can anyone explain the process in doing this problem. Thank you for any help in advance. ...

    Started by panda‎, 11-08-2014 10:29 PM
    • Replies: 1
    • Views: 224
    11-09-2014, 09:24 AM Go to last post
  50. The probability of seeing 13 minutes past the hour at least once every day?

    Each day, there are 24 opportunities in a 24 hour period to see 13 minutes past the hour. There are 60 x 24 possible times that can be reported in...

    Started by Petros‎, 10-30-2014 10:35 AM
    2 Pages
    1 2
    • Replies: 28
    • Views: 1,146
    11-08-2014, 03:40 PM Go to last post
  51. Beginning and end of rainy season. How to?

    Hi all, This is a beginner's question, I apologize for that. I have taken Descriptive Statistics and I am on my why to Probability and later...

    Started by yaraeovento‎, 11-08-2014 11:08 AM
    beginner, seasonal, seasonality
    • Replies: 2
    • Views: 216
    11-08-2014, 12:54 PM Go to last post
  52. How to calculate if a mean is above chance level

    Dear all, I have a problem to compare means from two groups with chance level. The Variable I want to compare against chance level is calculated...

    Started by knut‎, 11-07-2014 05:58 AM
    chance level
    • Replies: 2
    • Views: 194
    11-07-2014, 09:03 AM Go to last post
  53. Bayes' Priors

    With a Bayes factor, when specifying priors found in previous studies, I know to use 0 as the mean p(population value given theory) when using a half...

    Started by op2222‎, 11-06-2014 04:59 AM
    • Replies: 0
    • Views: 172
    11-06-2014, 04:59 AM Go to last post
  54. Someone Please Help!-Struggling Grad Student

    Can ANYONE please help me solve this problem, especially part D? (Or let me know I'm going in the right direction??). The tutors at my school are...

    Started by eheart‎, 11-04-2014 09:48 PM
    • Replies: 1
    • Views: 263
    11-04-2014, 11:11 PM Go to last post
  55. Assistance Please

    I'm having a tough time with my online stat course. Very limited feedback from instructor and I feel somewhat on my own. Can someone assist with...

    Started by amanda145‎, 11-04-2014 10:26 AM
    homework
    • Replies: 1
    • Views: 196
    11-04-2014, 12:56 PM Go to last post
  56. Question finding Confidence interval without CLT

    Hi all, I searched the posts and I did not get what I wanted. so here is the question: In our Hw we are given daily sales of pastries and coffee...

    Started by Faudis8‎, 11-04-2014 10:39 AM
    central limit theorem, confidence interval
    • Replies: 1
    • Views: 192
    11-04-2014, 11:40 AM Go to last post
  57. Backpropagated Probabilities

    To All: First, I am not sure if backproagation is the right way to define what I am looking at, but it appears to at least take the smallest...

    Started by bvw1987‎, 11-03-2014 09:38 PM
    • Replies: 2
    • Views: 220
    11-03-2014, 10:29 PM Go to last post
  58. law of total probability - variation formal names?

    Hello, there are different variations of the law of total probability. For example, the probability of 3 discreet events all occurring is: A1 *...

    Started by random512‎, 09-28-2014 05:59 PM
    • Replies: 1
    • Views: 276
    11-01-2014, 06:53 PM Go to last post
  59. How to find mean and variation from information given?

    I am very lost, my teacher gives us a bunch of notes that make absolutely no sense to me. This is the question im stuck on: -- 41% of adults have...

    Started by GrimGorilla‎, 10-30-2014 03:28 PM
    • Replies: 4
    • Views: 263
    10-30-2014, 04:33 PM Go to last post
  60. Probability of survey item-responses when participants could choose multiple items

    Hi there, I am trying to reanalyze some data from published research. My question is: how do you compare 2 proportions of responses, drawn...

    Started by g4eva‎, 10-30-2014 03:53 PM
    • Replies: 0
    • Views: 191
    10-30-2014, 03:53 PM Go to last post

+ Post New Thread
Page 1 of 81 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... 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