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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: 30,299
    09-30-2005, 09:44 AM Go to last post
  1. can someone solve this ?!

    find values of a b and c

    Started by Ahmedelwakeel‎, 12-22-2012 05:31 PM
    • Replies: 2
    • Views: 1,757
    12-22-2012, 10:49 PM Go to last post
  2. Basic probability question

    f(x) = x/4 for 0<x<2 = 1- x/4 for 2<x<4 = 0 otherwise Find c1 and c2 such that probability of (c1<x<c2)=0.6 So I tried to plot the...

    Started by ahoy‎, 10-14-2011 04:58 PM
    • Replies: 3
    • Views: 1,815
    10-15-2011, 03:27 AM Go to last post
  3. Homework problem, help me!

    Circuit boards are produced by a machine. Each board may turn out to be defective (Outcome D) with probability 0.1, good (Outcome D') with...

    Started by aimanR‎, 09-27-2010 06:10 PM
    • Replies: 4
    • Views: 4,637
    06-20-2012, 06:10 AM Go to last post
  4. Lightbulb Help help null and alternative hypotheses

    Null and Alternative Hypotheses -------------------------------------------------------------------------------- I have researched the site...

    Started by Aingeal34‎, 09-14-2007 08:13 PM
    • Replies: 2
    • Views: 3,113
    01-29-2008, 09:57 PM Go to last post
  5. Talking Could someone please help me and answer my question?????

    I posted the entire question earlier in the thread and I would greatly appreciate it if someone would help me and show me how to do the problem step...

    Started by Aingeal34‎, 09-17-2007 11:38 PM
    • Replies: 0
    • Views: 1,800
    09-17-2007, 11:38 PM Go to last post
  6. please help me with this stuff

    I have been working on this for 2 weeks and I really need help guys! I see everyone has read my stuff but nobody has posted anything. I have used the...

    Started by Aingeal34‎, 09-19-2007 04:41 PM
    • Replies: 0
    • Views: 2,601
    09-19-2007, 04:41 PM Go to last post
  7. Percentage/zscore

    What percentage of drivers drive over 72 mph? I know I have to convert 72 into a Z-score. Im not sure if thats the answer or more to it?

    Started by aire51‎, 09-15-2013 05:57 PM
    • Replies: 1
    • Views: 1,474
    09-17-2013, 10:54 AM Go to last post
  8. Help with normal approximation to the binomial distribution

    Hi all, I need help with a question I have for class. The question is: The the normal approximation to the binomial distribution to estimate the...

    Started by Airwolf‎, 03-11-2012 10:06 PM
    • Replies: 2
    • Views: 2,606
    03-14-2012, 02:52 AM Go to last post
  9. Help with Probability!

    Hi. I came across a few questions tht i came across while studyin for a probability chapter. Just a little request, im very new to probability so u...

    Started by aisha00‎, 12-08-2010 06:02 AM
    • Replies: 5
    • Views: 19,009
    12-09-2010, 10:41 AM Go to last post
  10. Probability Homework(2)

    The deeper i go into the probability chapter, the more confused i get :(, here are sum questions. they might be really easy but i'm not getting them....

    Started by aisha00‎, 12-09-2010 12:14 PM
    • Replies: 9
    • Views: 16,892
    02-24-2012, 11:19 PM Go to last post
  11. Probability on a normal curve

    Hey all - It's been a long time since I was in school looking at probability and statistics. i have a bit of a difficult question for me. I have...

    Started by AJ Laura‎, 06-07-2013 08:42 AM
    curve, normal, probability, statistics
    • Replies: 10
    • Views: 1,630
    06-07-2013, 01:47 PM Go to last post
  12. Bejeweled Combos

    Hi all, Many of you I assume are familiar with Bejeweled, a puzzle game in which the player swaps neighboring, colored gems in an 8 x 8 grid to...

    Started by ajile‎, 07-16-2010 10:41 AM
    • Replies: 2
    • Views: 4,063
    07-16-2010, 12:08 PM Go to last post
  13. Unhappy Need Help on Probability Probs.

    :confused: I'm having trouble with some problems: 1) Suppose that in a family, the probability of a child having black hair is .45, the...

    Started by ajk003‎, 02-17-2006 03:37 PM
    • Replies: 7
    • Views: 3,141
    02-09-2008, 11:27 AM Go to last post
  14. Rotated Ellipses

    Hi all, I've been thinking about this problem for a while, and I haven't been able to find a good starting point. This may be more of a...

    Started by ajm12‎, 07-28-2010 09:49 AM
    • Replies: 0
    • Views: 2,489
    07-28-2010, 09:49 AM Go to last post
  15. I Need Help Fast

    I HAVE AN EXAM ON WEDNESDAY AND CANNOT FIGURE OUT THESE TWO PROBLEMS FOR THE LIFE OF ME. IS THERE ANY WAY SOMEONE CAN TELL ME HOW TO DO THEM! 1. A...

    Started by ajones1225‎, 12-11-2006 03:54 PM
    • Replies: 7
    • Views: 3,282
    12-13-2006, 06:26 AM Go to last post
  16. Probably a simple problem

    This is a long question, so I'll put it in quotes. Sorry for the lame title, but I wasn't sure what else to call it. It's essentially a very basic...

    Started by ajstat‎, 05-17-2013 03:23 AM
    • Replies: 2
    • Views: 2,190
    07-23-2013, 02:03 AM Go to last post
  17. Probabilty : Round permutation problem

    A garland is to be formed with five roses and five dahlias. If they are arranged randomly, find the probability of roses and dahlias being arranged...

    Started by ak4su‎, 03-10-2011 07:51 AM
    • Replies: 5
    • Views: 4,840
    03-14-2011, 09:53 AM Go to last post
  18. In how many ways can 14 be rolled using 4, 6 sided dice?

    Hello, I am stuck in trying to figure out a possible number of permutations in which a certain sum of all dices rolled can be reached. For...

    Started by Akavall‎, 03-01-2012 10:02 PM
    • Replies: 3
    • Views: 6,120
    03-02-2012, 10:59 PM Go to last post
  19. Question I need help with these problems,

    Hey everyone, I am new at this forum. I need help with these problem... I hope you can provide me with full solution and steps please...

    Started by AkinIE‎, 02-26-2006 10:24 PM
    • Replies: 1
    • Views: 6,113
    02-26-2006, 10:34 PM Go to last post
  20. help please

    You are doing an industry analysis of the Bloomington pizza industry. The rate (per year) at which pizza restaurants enter the industry is given by...

    Started by AkinIE‎, 02-28-2006 12:09 PM
    • Replies: 0
    • Views: 3,743
    02-28-2006, 12:09 PM Go to last post
  21. random variable x

    Consider a continuous random variable X with the density function (called the exponential density) f(x) =8<: e^-x if x = 0; and 0 otherwise: a)...

    Started by AkinIE‎, 02-28-2006 12:11 PM
    • Replies: 1
    • Views: 3,058
    02-28-2006, 11:48 PM Go to last post
  22. 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: 1,155
    03-31-2012, 09:20 AM Go to last post
  23. Probability Problem related to Actuarial Sceince P1

    An insurer o ers a health plan to the employees of a large company. As part of this plan, the individual employees may choose exactly two of the...

    Started by akki‎, 02-26-2010 09:18 AM
    • Replies: 0
    • Views: 4,764
    02-26-2010, 09:18 AM Go to last post
  24. Expected value of absolute value without replacement

    I'm trying to figure something out for as a curiosity of mine, and I apparently can't remember enough of my college statistics class to solve it. If...

    Started by Akolas‎, 06-29-2015 10:54 AM
    • Replies: 1
    • Views: 2,198
    06-29-2015, 11:31 AM Go to last post
  25. Method of sampling

    If 25 people sign up for a workshop which has room for only 10, the naive way to select 10 is to put 25 numbers in a hat and choose 10 (assuming each...

    Started by Akrodon‎, 01-14-2014 08:45 PM
    • Replies: 2
    • Views: 1,590
    01-15-2014, 01:30 AM Go to last post
  26. Looking for assistance with random prize probability among family

    Hello all, I signed up specifically in search for some assistance in a real world problem, hope that's alright. We have an application that...

    Started by akskier‎, 06-23-2011 01:14 AM
    • Replies: 7
    • Views: 2,939
    06-29-2011, 11:55 AM Go to last post
  27. Probability after being given an initial condition

    This is a question I have received on my test and I am not sure whether or not my answer is correct. question: you are given 3 bags. First bag...

    Started by alaboudi‎, 10-08-2012 08:55 PM
    probability, sequential probability
    • Replies: 1
    • Views: 1,596
    10-08-2012, 11:44 PM Go to last post
  28. Tricky question

    Here's the problem: Let P(k) be a random draw of integers between 1 and k (inclusive). Assume you repeatedly apply P, starting at 10^1000. What's...

    Started by Aladdin‎, 11-11-2015 11:45 AM
    • Replies: 1
    • Views: 1,743
    11-11-2015, 09:31 PM Go to last post
  29. Poisson tricky problem

    Suppose that N individuals have a certain gain "a" at t0 and that each of them at any point in time participate to an independent lottery which...

    Started by alamorge‎, 02-18-2010 01:14 PM
    • Replies: 0
    • Views: 2,635
    02-18-2010, 01:14 PM Go to last post
  30. Probability of machine failure question

    Hi, While I'm an engineer, and have training in stats and probability, those aren't exactly my strong points, so I thought I'd ask you folks --...

    Started by alan speakman‎, 01-19-2013 12:24 PM
    • Replies: 7
    • Views: 4,003
    01-20-2013, 02:43 AM Go to last post
  31. Unhappy Probability

    Hi everyone, how can i start this? i have a lot of 32k parts and I would like to calculate the probability of finding one bad part in this lot, how...

    Started by albaosorio‎, 08-25-2012 11:42 AM
    • Replies: 2
    • Views: 1,632
    08-25-2012, 04:36 PM Go to last post
  32. using wrong distribution

    A small simple random sample is selected from a normally distributed populations for which population variance unknown. Construction of a confidence...

    Started by Albert‎, 11-30-2006 02:06 PM
    • Replies: 3
    • Views: 4,401
    11-30-2006, 04:01 PM Go to last post
  33. Conjunction of n hypothesis

    Ciao all, :wave: I have a conjunction of n non-independant hypothesis: h1 and h2 and .... and hn. I want to calculate the probability of...

    Started by aldebaran2‎, 09-13-2007 04:08 AM
    • Replies: 4
    • Views: 3,560
    09-16-2007, 09:38 AM Go to last post
  34. analyzing the PDF or the CDF ??

    Hi, I'm recently grappling with the following problem: For my thesis i had to fit my data with two theoretical distribution (gamma and...

    Started by aledanda‎, 08-27-2009 07:22 AM
    • Replies: 0
    • Views: 2,359
    08-27-2009, 07:22 AM Go to last post
  35. Method of moments

    what are the advantages of using the method of moments instead of the maximum likelyhood for estimating the parameters? In my case I hade to find...

    Started by aledanda‎, 08-27-2009 07:27 AM
    • Replies: 1
    • Views: 2,695
    08-27-2009, 08:52 AM Go to last post
  36. Help in solving a question

    Hello everyone, I am working on some exercise questions from probability. I am stuck at this question. Can somebody help me to solve this. I would...

    Started by Aleem‎, 08-01-2015 04:09 PM
    proability
    • Replies: 3
    • Views: 1,595
    08-13-2015, 12:33 AM Go to last post
  37. is this a renewal process?

    Hi. I'm having trouble with renewal processes. I want to obtain a long run cost, and to do that, I want to prove that a process is a renewal process,...

    Started by alejandro107‎, 07-13-2009 05:35 PM
    • Replies: 0
    • Views: 1,906
    07-13-2009, 05:35 PM Go to last post
  38. Comparing CDFs using Chi squared?

    HI, I have a set of data from which I can construct the cumulative distribution function. I then compare this contructed CDF with the CDFs of a...

    Started by aler‎, 07-09-2008 11:45 AM
    • Replies: 3
    • Views: 4,632
    07-10-2008, 07:44 AM Go to last post
  39. Adjusted odd ratio interpretation

    Hi There, I have a question regarding adjusted ODD RATIO interpretation I am trying to interpret a table of results of logistic regression...

    Started by alessandra‎, 06-11-2009 05:47 AM
    • Replies: 1
    • Views: 8,690
    06-11-2009, 08:09 AM Go to last post
  40. conditional probability question

    I'm having trouble with the following problem: I want to know P(X>C | W>C) with C a known fixed constant, X and W both normally distributed...

    Started by Alex C‎, 04-15-2016 10:28 AM
    • Replies: 0
    • Views: 1,082
    04-15-2016, 10:28 AM Go to last post
  41. 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: 1,963
    11-16-2011, 05:36 AM Go to last post
  42. 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)...

    Started by alex01‎, 03-22-2014 10:34 AM
    probability question, similarities, statistics
    • Replies: 2
    • Views: 1,534
    03-22-2014, 02:22 PM Go to last post
  43. Unhappy Need help with Uniform probability distribution

    Hey guys... I'm sort of confused about these two problems. If you guys can help me out that would be great. Problem: Suppose X is a random...

    Started by alex123‎, 10-15-2012 12:07 PM
    distribution, probability, random variable, unifrom
    • Replies: 2
    • Views: 2,553
    10-15-2012, 12:22 PM Go to last post
  44. need help

    hey kind people, i got some problems from my statistics assigment that i dont understand (couldnt get this 4 out of 15), so if you can give me...

    Started by alex19‎, 12-11-2006 02:00 AM
    • Replies: 2
    • Views: 5,226
    12-11-2006, 08:32 PM Go to last post
  45. Calculate the moment generating function

    Hello, I can not calculate the generating function of X / Y = y . E (e ^ (-t X / Y = y)). (see attached file) Thanks so much.

    Started by Alex2015‎, 08-03-2015 08:10 AM
    • Replies: 0
    • Views: 913
    08-03-2015, 08:10 AM Go to last post
  46. Statistics and signal processing

    Please, help me to understand with logic of mathematical calculations resulted in work pubs.drdc.gc.ca/PDFS/unc06/p518839.pdf. First of all to me the...

    Started by alex65111‎, 08-30-2009 02:18 PM
    • Replies: 0
    • Views: 1,897
    08-30-2009, 02:18 PM Go to last post
  47. Standard Deviation

    Is it possible to calculate the mean and standard deviation of a normal distributed source population when only a few sample means (of non equal...

    Started by Alexander‎, 07-28-2009 03:48 PM
    • Replies: 5
    • Views: 2,754
    07-31-2009, 10:24 AM Go to last post
  48. Chance of winning - question

    Hi, I have not figured out how to solve the following questions: 1. Report the chance that Bears wins at least 6 games this year. 2. Compute...

    Started by Alexander1981‎, 07-26-2011 04:09 PM
    • Replies: 2
    • Views: 1,714
    07-28-2011, 02:34 PM Go to last post
  49. Can't reconcile probability information

    Hello there! I'm doing a review course in probability that I thought would be trivial. By and large, I'm not having any difficulty, but one...

    Started by alexandicity‎, 01-23-2010 08:30 PM
    • Replies: 2
    • Views: 2,406
    01-25-2010, 02:41 PM Go to last post
  50. Probability of outcome that hasn't been previously recorded.

    Hello, If I have three binary random variables: A B and C, and the following set of test results, how can I guess the value of x? A B C 1 0...

    Started by alexeiboronine‎, 09-27-2010 01:09 PM
    • Replies: 0
    • Views: 1,932
    09-27-2010, 01:09 PM Go to last post
  51. Tricky problem solution

    Hi, A soccer team plays matches. -- If in a previous match it won, it has a 0.6 chance to win in the next match (if it failed, the chances to...

    Started by alexeymosc‎, 08-26-2013 09:31 AM
    • Replies: 4
    • Views: 2,071
    09-04-2013, 12:57 AM Go to last post
  52. Probability Distribution Problem

    Could anyone point me in the right direction in terms of how to approach the following questions based on the scenario below. If you could just break...

    Started by alexis2‎, 11-21-2010 02:37 PM
    • Replies: 1
    • Views: 2,847
    11-21-2010, 04:42 PM Go to last post
  53. Simple question on calculating p-values

    In a question that I am working on, I have to "report 10 p-values that I obtain" from a coin simulation. The question then goes on to ask that we...

    Started by alexis2‎, 11-21-2010 07:38 PM
    • Replies: 1
    • Views: 3,197
    11-21-2010, 09:06 PM Go to last post
  54. Probability question

    Here is the problem: To get to work, a commuter must cross train tracks. The time the train arrives varies slightly from day to day , but the...

    Started by AlexKom‎, 12-13-2005 09:09 PM
    • Replies: 4
    • Views: 9,620
    12-15-2005, 11:13 AM Go to last post
  55. Probability

    HEllo! I have a trouble with probabilities and I need your help... The probability of an event is 2/10, which means 1/5 = .2 What is the...

    Started by AlexKom‎, 12-21-2005 10:22 PM
    • Replies: 3
    • Views: 2,542
    12-21-2005, 10:37 PM Go to last post
  56. Probability Problem

    Hi, Here is the problem: Roll a die twice: What is the probability of observing exactly one 5? I think that the answer is 5/36: P(5)=1/6; P(5...

    Started by AlexKom‎, 01-04-2006 06:16 PM
    • Replies: 2
    • Views: 3,186
    01-05-2006, 07:59 AM Go to last post
  57. Help

    Hello, Here is the problem: "Assume the heights of high school basketball players are normally distributed. For boys the mean is 74 inches with...

    Started by AlexKom‎, 01-22-2006 09:02 PM
    • Replies: 2
    • Views: 4,809
    01-23-2006, 05:49 AM Go to last post
  58. Special Dice

    Here is the problem: Two players compete against each other by rolling dice- not the traditional dice ,though. One face of Alphonso's die has an 8...

    Started by AlexKom‎, 01-22-2006 10:03 PM
    • Replies: 2
    • Views: 7,162
    01-23-2006, 05:41 AM Go to last post
  59. Identify Statistically Significant Data Point when Mean/Variance Unknown

    I am conducting a screen of a wide range of compounds and generating measurements for their effect on a protein. We have conducted some work on...

    Started by alexllew‎, 09-30-2014 05:11 AM
    • Replies: 0
    • Views: 2,266
    09-30-2014, 05:11 AM Go to last post
  60. Calculating Probability of Failure

    I am a solicitor with an engineering background. I have a client who needs to work out what the probability is that a customer will be injured by a...

    Started by alexmay‎, 01-31-2013 06:46 AM
    • Replies: 6
    • Views: 2,937
    01-31-2013, 02:32 PM Go to last post

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