1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,876
+ Post New Thread
Page 20 of 91 FirstFirst 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 35 36 37 38 39 70 ... LastLast
Threads 1141 to 1200 of 5451

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: 30,322
    09-30-2005, 09:44 AM Go to last post
  1. Cool okay need insight on this...

    I have attempted to work this out twice use 2 different formulas (1.interval estimation of a population mean (small-sample case) 2. interval...

    Started by ecohelp‎, 10-15-2005 12:04 PM
    • Replies: 4
    • Views: 3,538
    08-22-2011, 06:56 AM Go to last post
  2. I need Probability help

    hey folks! I've been given two probability questions for my home assignment. I've been trying to solve these problems but having difficulty...can...

    Started by silentcore‎, 12-19-2010 10:03 AM
    • Replies: 4
    • Views: 3,861
    09-17-2011, 04:40 AM Go to last post
  3. 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: 2,867
    04-07-2011, 12:15 PM Go to last post
  4. question please help!

    Let Y1, Y2,...,Yn be independent Poisson random variables with means λ1, λ2, ...,λn, respectively. find a. probability function of Σyi( i=1 to n) ...

    Started by probabilityhelp‎, 04-08-2011 12:19 AM
    • Replies: 4
    • Views: 10,026
    04-08-2011, 01:59 AM Go to last post
  5. Yet another "flipping" coin problem

    Hi folks, So we flip two balanced coins. If at least one of them shows tails what is the probability that the other coin is also tails? My answer:...

    Started by ramrad‎, 04-12-2011 01:27 PM
    • Replies: 4
    • Views: 3,578
    04-12-2011, 08:15 PM Go to last post
  6. Question Probability Marbles!!

    There are 5 red marbles and 195 blue marbles. Marbles are drawn randomly with replacement. What is the smallest number of draws, (d) for which...

    Started by ari142‎, 04-28-2011 05:18 PM
    • Replies: 4
    • Views: 2,784
    04-29-2011, 03:17 PM Go to last post
  7. Card guessing problem

    I took statistics & probability in college, but, for some reason, I seem to have a mental block on how certain things work. I never know which...

    Started by eleasmom‎, 05-09-2011 02:18 AM
    • Replies: 4
    • Views: 3,503
    05-15-2011, 04:26 AM Go to last post
  8. Total Probaililty (both defective)

    Problem: I don't have the solution to this problem. I think the approach is to solve it by "total probability". P(DD) = P(I)*P(D | I)...

    Started by jwxie518‎, 06-21-2011 05:16 AM
    • Replies: 4
    • Views: 2,275
    06-26-2011, 05:32 PM Go to last post
  9. Can someone confirm if i calculated this properly

    In a jar we have: 2 Big White Balls 4 Small White Balls 2 Big Black Balls 2 Small Black Balls Blindfolded we pick 2 balls out the jar.....

    Started by nered‎, 07-02-2011 02:44 PM
    • Replies: 4
    • Views: 2,162
    07-02-2011, 10:56 PM Go to last post
  10. exponential distribution: funtional system

    Problem: The system is functional if all 3 of its components are in working condition. If lifetime of each components is distributed...

    Started by jwxie518‎, 07-06-2011 08:07 PM
    • Replies: 4
    • Views: 4,277
    07-09-2011, 12:08 PM Go to last post
  11. Throwing a die 7 times

    Hello, my problem is as follows: Throw a die 7 times. i) What is the probability that you get number 6 twice and all other numbers...

    Started by binjip‎, 07-09-2011 01:25 PM
    die, permutation
    • Replies: 4
    • Views: 2,635
    07-10-2011, 06:19 AM Go to last post
  12. Probability Question

    Health public researcher checked data from a group of 937 men that died in 2009. The researcher found that 210 of the men died from heart related...

    Started by Yankel‎, 07-18-2011 11:47 AM
    • Replies: 4
    • Views: 2,577
    07-22-2011, 02:39 PM Go to last post
  13. Smile My answers to a revision paper

    Hi, I was wondering if I could get some of these answers checked for me. The paper I am working from is here and I am attempting section A...

    Started by TheNCO‎, 07-22-2011 10:14 AM
    • Replies: 4
    • Views: 3,670
    07-25-2011, 11:25 AM Go to last post
  14. Kind of unusual problem...

    So this may seem sort of silly but was hoping I could get some help. I am not a very mathematical person but it has interested me a lot recently so...

    Started by AcrylicAce‎, 08-08-2011 12:40 PM
    • Replies: 4
    • Views: 1,840
    08-08-2011, 05:51 PM Go to last post
  15. Assignment Problem ((urgent))

    Hey all. I am having some difficulty with one question on an assignment I have been workiing on. I am quite new to stats and I cannot find a...

    Started by Georgyb‎, 08-20-2011 11:09 PM
    • Replies: 4
    • Views: 2,460
    08-21-2011, 01:34 AM Go to last post
  16. drawing more than one marble at random

    Hi, Can you please check my solutions? I guess, I have got them right.Thanks Probability 1) If four marbles are drawn at random from a bag that...

    Started by SadieKhan‎, 08-21-2011 10:35 PM
    • Replies: 4
    • Views: 4,840
    08-22-2011, 08:30 AM Go to last post
  17. Probability Density function table

    given the pdf table for function pxy(x,y) for 2 discrete random variables X and Y which take values 0,1. What do E and Cov(X,Y) equal and what is the...

    Started by marley.grace‎, 08-24-2011 07:17 AM
    • Replies: 4
    • Views: 4,337
    08-24-2011, 09:45 AM Go to last post
  18. Probabilities: "Drunk is 10 steps away form falling in the dock"

    A drunk is 10 steps away from falling in the dock. Every step he takes is either directly towards or away from the dock and he is equally likely to...

    Started by Taylor Truett‎, 09-14-2011 11:26 AM
    • Replies: 4
    • Views: 3,221
    09-14-2011, 12:28 PM Go to last post
  19. Unhappy really urgent probability problem - is it bayesian?

    Hi, I have an urgent problem but I'm a little lost. Is this probability question referring to the use of Bayes' theorem? Firstly, I don't...

    Started by anony‎, 09-14-2011 05:46 AM
    bayes, prior, probability, sample text
    • Replies: 4
    • Views: 2,830
    09-14-2011, 08:48 AM Go to last post
  20. Cool Please help me with Poisson Distribution

    :shakehead The class had calculated that 80% of Statistics and Modelling lessons, are interrupted by one or more notices. Find a) the average...

    Started by tosucceed999‎, 09-19-2011 09:32 PM
    • Replies: 4
    • Views: 3,090
    09-20-2011, 02:19 AM Go to last post
  21. Stuck on a (trivial) derivation for mixed effects linear models...

    i know this is horribly basic, but for some reason i'm not on top of my game now and cant work something very easy out. the general...

    Started by will22‎, 09-21-2011 02:30 PM
    • Replies: 4
    • Views: 2,737
    09-26-2011, 09:44 AM Go to last post
  22. Multinomial Distribution shortcut?

    I'm wondering is there any kind of shortcut with the Multinomial Distribution. Suppose i have 6 balls:{3R,2B,1G} and i make 3 draws (with...

    Started by hughesne‎, 10-17-2011 01:10 PM
    • Replies: 4
    • Views: 3,320
    10-17-2011, 03:05 PM Go to last post
  23. Basic Probability Homework

    We just stated to have about probability at the ongoing course. We have this Exercise which I, apparently, cannot figure out how to calculate. "...

    Started by hotjer‎, 10-10-2011 06:11 AM
    • Replies: 4
    • Views: 3,288
    10-10-2011, 08:13 AM Go to last post
  24. probability given p=.10

    Question: A manufacturer of power meters, which are used to regulate energy thresholds of a data-communications system, claims that when its...

    Started by MikeM‎, 10-13-2011 07:21 PM
    • Replies: 4
    • Views: 3,361
    10-14-2011, 05:30 AM Go to last post
  25. Question. Non parametric analysis in SAS

    I have a question perhaps someone can easily answer. I used a random block design and couldn't get normal distribution on the data. I then switched...

    Started by Tyler Brannon‎, 10-16-2011 09:38 PM
    • Replies: 4
    • Views: 3,148
    10-16-2011, 09:56 PM Go to last post
  26. marginal and conditional density and probability

    Dear all, I really need your help in solving these questions. If X is the amount of money (in dollars) that a salesperson spends on gasoline and...

    Started by sheila‎, 10-22-2011 06:44 AM
    • Replies: 4
    • Views: 3,870
    10-29-2011, 03:23 PM Go to last post
  27. Hypergeometric Random Variable help!

    Here's the question, I've tried all the formulas given to me in the chapter, and none are working. I'm guessing to use the mean and...

    Started by dbm4891‎, 10-24-2011 02:30 PM
    • Replies: 4
    • Views: 5,937
    10-24-2011, 03:01 PM Go to last post
  28. Question Wheel of lucky problem

    Dear everyone, Here is the problem I tried by defining the functions S(a) and C(a), where S(a) denotes the probability of player A winning if...

    Started by ilhamdoank‎, 10-25-2011 05:07 PM
    probability question
    • Replies: 4
    • Views: 2,247
    10-26-2011, 11:23 AM Go to last post
  29. Sampling and Estimation (From STPM)

    A random sample X1,X2,X3,...,Xn is taken from a normal population with mean "u" and variance 1. Determine the smallest sample size which is required...

    Started by Euclidzz‎, 10-25-2011 09:48 PM
    • Replies: 4
    • Views: 3,549
    10-25-2011, 11:49 PM Go to last post
  30. Sandbagger

    What is the probability of a golfer winning 3 out of 4 golf tournaments? 5 out of 7? 40 players in each tournament, players have USGA handicaps.

    Started by hoppergrass‎, 10-31-2011 04:19 PM
    probability question
    • Replies: 4
    • Views: 2,205
    11-01-2011, 09:45 PM Go to last post
  31. Exponential Family

    Hi! I'm trying to demonstrate that the following distribution is a member of the exponential family. Theta * x^(Theta-1) * exp (-x^Theta) ...

    Started by jamesmartinn‎, 11-03-2011 05:55 PM
    • Replies: 4
    • Views: 4,325
    11-04-2011, 08:29 AM Go to last post
  32. Distributive Law P[A u (B n C)]

    I am trying to find a synonymous formula formula for: P = P Can anybody help me? I found somewhere that said it was equal to P but I...

    Started by lancearmstrong1313‎, 11-05-2011 03:27 PM
    • Replies: 4
    • Views: 15,762
    11-05-2011, 04:07 PM Go to last post
  33. 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: 6,245
    11-09-2011, 11:41 AM Go to last post
  34. joint distribution of f(x,y)

    joint distribution f(x,y) = (1/4)xy if 0<x<2, 0<y<2 = 0 otherwise how to find P(XY<2)? I wrote it out as ∫(from 2...

    Started by hphsu‎, 11-14-2011 08:48 PM
    • Replies: 4
    • Views: 3,055
    11-15-2011, 02:21 AM Go to last post
  35. please i need help with my HW

    hello i have question in my home work that i was tried to solve it but unfortunate i can't the question: Harrison Water Sports has three...

    Started by saddawyah q6r‎, 11-19-2011 08:03 AM
    • Replies: 4
    • Views: 4,931
    11-19-2011, 02:37 PM Go to last post
  36. Weighted multivariate hypergeometric distribution?

    Hi, I'm writing a simulation where part of it can be done using the following steps: 1. Choose 1 element from with probability without...

    Started by Ben1979‎, 11-25-2011 10:40 AM
    • Replies: 4
    • Views: 3,214
    11-28-2011, 07:05 PM Go to last post
  37. help for task in R programming language

    This is my task. I don't know how to solve it in R studio. Please help me!!! Simulate: a) 15 values from N(0,1) distribution b) 50 values from...

    Started by zemzela‎, 11-27-2011 05:24 AM
    density function, means, plot, r programming help, standard deviation
    • Replies: 4
    • Views: 2,921
    11-28-2011, 12:35 PM Go to last post
  38. Poisson test help!

    Hi! I am sitting with a school assignment, but I got stuck on this one. I am suppose to test if my data is Poisson-distributed. The data has a...

    Started by RToss‎, 12-03-2011 06:35 AM
    • Replies: 4
    • Views: 2,405
    12-03-2011, 08:33 AM Go to last post
  39. Simple Prob. Question / problem

    Hey, Im new to the forum and have loved reading and lurking over the past few weeks. I have a question my friends and I constatnly argue over and...

    Started by jo2jo‎, 12-01-2011 03:56 PM
    • Replies: 4
    • Views: 1,740
    12-01-2011, 04:26 PM Go to last post
  40. Question statistical decision making

    :wave: Is it possible to know if whether an error in statistical decision making has been committed in a single study?

    Started by stat12‎, 12-01-2011 06:49 PM
    • Replies: 4
    • Views: 2,523
    12-02-2011, 01:41 PM Go to last post
  41. Bowl with marbles

    Hi there, I have difficulties in resolving this problem: In a bowl we have 5 white marbles and 15 black marbles. What is the probability of...

    Started by tuse‎, 12-02-2011 06:18 AM
    • Replies: 4
    • Views: 2,381
    12-02-2011, 03:46 PM Go to last post
  42. Probability Density Function

    Hello guys I just want my work to be reviewed on this exercise please :) Consider X a random variable with pdf f X (x) = (3/8) * (1-x)^2 if...

    Started by Darktranquillity‎, 12-04-2011 06:30 PM
    • Replies: 4
    • Views: 2,662
    12-05-2011, 11:04 AM Go to last post
  43. distribution help

    I am just completely failed my online test and my teacher is letting me retake this 20 point question to try and pass...if anybody can help me out I...

    Started by jdhaas3‎, 12-10-2011 01:59 PM
    • Replies: 4
    • Views: 1,809
    12-10-2011, 03:28 PM Go to last post
  44. Basic binomial question (normal curve approximation)

    Hello, Could you please give me some guidance on the question below: 5. A multiple-choice test consists of 25 questions, each with four possible...

    Started by pcampin‎, 12-19-2011 05:14 PM
    • Replies: 4
    • Views: 2,110
    12-20-2011, 01:42 PM Go to last post
  45. Distribution of xy/z

    Hi can someone please help me find the distribution for xy/z where x,y,z are uniform from 0 to 1 and independent. Having trouble with my set up...

    Started by nubyra‎, 01-02-2012 02:16 PM
    • Replies: 4
    • Views: 4,319
    01-03-2012, 03:42 AM Go to last post
  46. Help! I’m baffled with a probability problem…..

    Hi, Newby here. I am hoping someone on here can assist with a probability question that’s troubling me. I have three ‘events’, in each event...

    Started by RobD‎, 01-09-2012 09:32 AM
    • Replies: 4
    • Views: 65,093
    01-09-2012, 11:39 AM Go to last post
  47. Probability Density Function of normal distribution

    I have a question: Please give the probability density function of a normal distribution trun- cated to . Can anyone pls help me to solve this...

    Started by Putu Prapita‎, 01-20-2012 10:04 PM
    • Replies: 4
    • Views: 3,329
    01-20-2012, 10:21 PM Go to last post
  48. Post Please Help with this problem

    Hey Evry1..... I have been facing a problem in achieving the solution for the following question in quite some time. Kindly help me with the...

    Started by nibinenator‎, 01-27-2012 02:22 AM
    • Replies: 4
    • Views: 2,096
    01-27-2012, 11:57 PM Go to last post
  49. Blood Groups - I think this is right?

    46% of people have blood type O, 42% have type A, 9% have type B and 3% have AB. Among 4 potential donors, what is the probability that: A) all are...

    Started by kelly g‎, 01-28-2012 01:03 AM
    • Replies: 4
    • Views: 1,717
    01-28-2012, 03:37 AM Go to last post
  50. Independent events?

    I don't know how to do this question...how to find if one event is independent of another. I answered the following question: After surveying...

    Started by kelly g‎, 01-28-2012 01:28 AM
    • Replies: 4
    • Views: 3,839
    01-28-2012, 02:50 PM Go to last post
  51. Probability distribution function for extracting b balls out of a urn.

    Hello everybody, First of all I would like to say that I am not a student trying to get his homework solved. Rather I am a software developer...

    Started by Radu‎, 02-01-2012 12:01 PM
    balls, binomial, hypergeometric, urn
    • Replies: 4
    • Views: 3,894
    02-14-2012, 10:09 AM Go to last post
  52. Keno Game Question

    - This game has 70 balls. - 20 are picked. - 2 are chosen. - Approximate odds of winning are 1 in 13. - Normal payout is 7-1. If the payout...

    Started by Peter Seiller‎, 02-02-2012 04:48 PM
    • Replies: 4
    • Views: 3,107
    02-02-2012, 08:37 PM Go to last post
  53. EX and var(X)

    I need some help with this conceptually. Find EX and var(X) for a random variable with pdf f(x)= 1/2e^(-|x|) Is this correct? {\it...

    Started by BiGsombrerO‎, 02-06-2012 10:27 PM
    • Replies: 4
    • Views: 3,388
    02-06-2012, 11:18 PM Go to last post
  54. project help

    This seems really simple to me but I'm not sure how to go about it since I haven't taken stats in 4 years... population = 150 a certain response =...

    Started by gix6‎, 02-06-2012 11:16 PM
    • Replies: 4
    • Views: 2,019
    02-06-2012, 11:44 PM Go to last post
  55. Calculate Prob's using multiple means and std dev's

    Hi all. My first post. I'm trying to find a correct methodology for a problem and am a bit stumped as I don't really know how to frame it in a...

    Started by Wenona‎, 02-14-2012 05:57 AM
    • Replies: 4
    • Views: 2,577
    02-15-2012, 09:03 AM Go to last post
  56. Question - Having a hard time figuring this out

    USA Today reported that "high-volume" hospitals performed 77% of bladder removal surgeries, and the rest were performed in "low-volume" hospitals....

    Started by ramil13‎, 02-14-2012 08:20 PM
    • Replies: 4
    • Views: 2,139
    02-15-2012, 03:41 AM Go to last post
  57. Variances and comparison of biased and unbiased estimators.

    If was shown that if: S'^2= (summation(Yi-Ybar)^2)/n and S^2= (summation(Yi-Ybar)^2)/(n-1) then S'^2 is a biased estimator of sigma, but...

    Started by APOCooter‎, 02-21-2012 03:02 PM
    • Replies: 4
    • Views: 2,833
    02-21-2012, 06:40 PM Go to last post
  58. need help in probability problem

    Hi all, I'm practicing some probability problems and I got a homework couldn't understand a problem in here The problem is: Anew digital scale...

    Started by yoha‎, 02-23-2012 10:27 PM
    • Replies: 4
    • Views: 1,926
    02-26-2012, 02:35 PM Go to last post
  59. Question Conditional Probability and Negative Exponential distribution.

    Good day to everyone. I'm an italian computer science student, and i'm missing just an exam to get my long awaited Laurea... long story short, I had...

    Started by fade2black‎, 02-24-2012 01:03 PM
    • Replies: 4
    • Views: 3,338
    02-25-2012, 09:28 AM Go to last post
  60. The Mean and Std. Deviation of a probability distribution

    Q: Select a bill from a box that contains 3 $1 bills, 2 $5 bills, 2 $10 bills, 3 $20 bills. a) Construct a probability distribution b) Find the...

    Started by Scarecrow‎, 02-29-2012 01:22 PM
    • Replies: 4
    • Views: 3,324
    02-29-2012, 04:53 PM Go to last post

+ Post New Thread
Page 20 of 91 FirstFirst 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 35 36 37 38 39 70 ... 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