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: 30,320
    09-30-2005, 09:44 AM Go to last post
  1. Percentile of a Poisson variable

    Hi, How can I find the 90th percentile of a Poisson random variable with lamba = 0.4 ? I tried: e-0.4 (0.4^.90) / 0.9! but this gives...

    Started by Silvanus‎, 11-03-2008 12:17 AM
    • Replies: 3
    • Views: 5,108
    11-03-2008, 04:16 PM Go to last post
  2. random variables

    Question: The number of littly, teeny raisins (x) in a box of a popular brand of raisin bran cereal has a distribution with mean 280 and s.d. 25....

    Started by letsstophere‎, 11-04-2008 12:32 PM
    • Replies: 3
    • Views: 3,840
    11-04-2008, 10:41 PM Go to last post
  3. Poisson Process

    Hello, Have a task I cant solve; incomming calls to a central follows a poisson process with λ > 0, infinity capasity, and all calls are taken...

    Started by RicoQQ‎, 11-03-2008 04:14 AM
    • Replies: 3
    • Views: 3,971
    11-05-2008, 04:45 AM Go to last post
  4. Please help with stats problem

    I need help with part of a problem in my Stats book. There are four parts to the problem, and I understand how to do the other three parts, I'm just...

    Started by lizard_14256‎, 11-05-2008 06:54 AM
    • Replies: 2
    • Views: 4,412
    11-05-2008, 10:41 AM Go to last post
  5. another transformation

    Let X be a continuous random variable with p.d.f. f (x) = k(1 − x^2 ), |x| ≤ 1 0,otherwise Show that k = 3/4. I'm not sure...

    Started by jamesmartinn‎, 11-05-2008 12:05 PM
    • Replies: 2
    • Views: 2,889
    11-05-2008, 04:19 PM Go to last post
  6. Regression Control Chart

    I have a project that needs to plot to regression control chart. Can anyone tell me which statistical software I can use for this purpose? Thanks a...

    Started by hollybuddy‎, 11-05-2008 08:51 PM
    • Replies: 0
    • Views: 2,691
    11-05-2008, 08:51 PM Go to last post
  7. Help

    I have a couple of questions on my hw that I cannot figure out please help me A) Find P(Z=0) B) Find the z-score that separates the bottom...

    Started by steward@comcast.net‎, 11-05-2008 09:09 PM
    • Replies: 0
    • Views: 1,791
    11-05-2008, 09:09 PM Go to last post
  8. Can anybody help me with this probability question?

    helpneeeded

    Started by sahilkthr‎, 11-05-2008 03:42 PM
    • Replies: 4
    • Views: 2,303
    11-06-2008, 02:24 AM Go to last post
  9. Please help me i need help

    have a couple of questions on my hw that I cannot figure out please help me A) Find P(Z=0) B) Find the z-score that separates the bottom...

    Started by steward@comcast.net‎, 11-05-2008 09:58 PM
    • Replies: 2
    • Views: 2,707
    11-06-2008, 09:23 AM Go to last post
  10. Help! First time taking Stats and soooo confused!

    I'm taking Statistics online and every week I can barely get through the assigned problems. I'm not sure how to even begin figuring out this...

    Started by Midnightedge21‎, 10-19-2008 01:05 PM
    • Replies: 12
    • Views: 5,449
    11-06-2008, 09:53 AM Go to last post
  11. Help please! The sum of two rolling die

    hey! Does anyone know how to do this question: "You keep rolling a die until either: 1. The sum of the two die is equal to 7, twice 2. A 6...

    Started by michelle1010‎, 10-01-2008 11:01 PM
    • Replies: 3
    • Views: 3,012
    11-06-2008, 11:24 AM Go to last post
  12. zmoggggg -- Continuation of Poisson question, please verify and advise

    ok so lambada value here =4 (Average of 240 planes in 1 hr) and for the following question a) atleast 1 plane arrives during the 10-minute...

    Started by sahilkthr‎, 11-06-2008 11:37 AM
    • Replies: 2
    • Views: 2,187
    11-06-2008, 01:50 PM Go to last post
  13. uniform dist. parameter est.

    Here is the problem: Use MLE to estimate the parameters of the two parameter uniform pdf f_Y_(y;theta1,theta2)=1/(theta2-theta1);...

    Started by anna_s‎, 11-05-2008 09:32 PM
    • Replies: 1
    • Views: 2,590
    11-06-2008, 02:08 PM Go to last post
  14. Please help Its urgent --Probability question

    Robert is a

    Started by sahilkthr‎, 11-05-2008 01:51 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 5,516
    11-06-2008, 06:03 PM Go to last post
  15. Sampling marbles

    I have an urn containing N marbles: M white marbles and N-M black marbles. From this urn, I need to grab a handful of marbles (n) and figure out...

    Started by Rothko‎, 11-06-2008 06:51 PM
    • Replies: 0
    • Views: 2,555
    11-06-2008, 06:51 PM Go to last post
  16. Transformation of Y = 1/X

    X ~ U(2,4). Find the density of Y = 1/x f(x) = (1/2, 2<x<4) (0,elsewhere) G(Y) = P(Y<y) = P(1/X<y) = P(X>1/Y) = 1 -...

    Started by jamesmartinn‎, 11-06-2008 08:56 PM
    • Replies: 3
    • Views: 6,605
    11-07-2008, 06:45 AM Go to last post
  17. Questions need help!!

    Weekly demand for packs of a certain make of chocolate trifle at a major supermarket store has a Normal distribution with mean of 200 and standard...

    Started by zxadriano‎, 11-07-2008 07:03 AM
    • Replies: 0
    • Views: 2,254
    11-07-2008, 07:03 AM Go to last post
  18. Random Thoughts?

    This is a question I am thinking through and just need some input as to whether I am reasoning correctly. I have never thought of the sample mean as...

    Started by statsmom‎, 11-07-2008 01:13 PM
    • Replies: 3
    • Views: 1,890
    11-08-2008, 12:10 AM Go to last post
  19. Probability question -- T Distribution

    You are the head of the Amex card group. Nationally, the credit card default rate is at 12&#37; A random sample of 25 Amex card holders shows a default...

    Started by messanger123434‎, 11-06-2008 06:08 PM
    • Replies: 3
    • Views: 2,651
    11-08-2008, 08:54 AM Go to last post
  20. HElp

    3. (15 points / 3 points each) Wait time for a taxi outside Penn Station in New York City is uniformly distributed on the interval (0, 420) where...

    Started by steward@comcast.net‎, 11-09-2008 03:03 PM
    • Replies: 1
    • Views: 1,637
    11-09-2008, 03:31 PM Go to last post
  21. Please help me on a really easy probability question -_-

    I dont know why I cant get this, i know its not hard. Id really appreciate it if someone could clear this up for me =( If there are 72 multiple...

    Started by dvm‎, 11-10-2008 10:05 PM
    • Replies: 7
    • Views: 2,415
    11-11-2008, 12:16 PM Go to last post
  22. Question Cereal Prizes

    Hi, I'm stumped on a probability question. Here's the situation...a cereal company gives away 3 different prizes in its boxes of cereal, with...

    Started by M_Brando‎, 11-10-2008 04:17 PM
    • Replies: 7
    • Views: 3,819
    11-11-2008, 07:39 PM Go to last post
  23. Parametric Test on Ordinal Data

    Hi to everybody, can I used a parametric test to compare, for example, two independent samples when these samples contain ordinal data and are...

    Started by Canyon75‎, 11-12-2008 11:17 AM
    • Replies: 0
    • Views: 3,211
    11-12-2008, 11:17 AM Go to last post
  24. Unidentified Distribution

    I am working on a project and need help identifying a distribution. My work is attached. Any help in identification would be appreciated....

    Started by statsmom‎, 11-12-2008 01:24 PM
    • Replies: 0
    • Views: 1,652
    11-12-2008, 01:24 PM Go to last post
  25. Complicated STATs problem

    Say I have five variables A, B, C, D and E that range anywhere from -11 to 11. Given that A,B,C and D occur before E and there is correlation,...

    Started by senthil196‎, 11-13-2008 12:58 PM
    • Replies: 0
    • Views: 2,696
    11-13-2008, 12:58 PM Go to last post
  26. Estimation problem, please help

    Here is my problem. I need to estimate a ramdom variable h with a chi-square distribution, that is, h= x^2+y^2 with x and y gaussian. The observed...

    Started by Jorge‎, 11-13-2008 01:25 PM
    • Replies: 0
    • Views: 2,357
    11-13-2008, 01:25 PM Go to last post
  27. Please help with computing expectation!

    I have trouble with the following two questions concerning expectations, can anyone give me a hint? Question 1) Suppose there are k=10 types of...

    Started by yellowrose2011‎, 11-11-2008 01:43 PM
    • Replies: 5
    • Views: 3,926
    11-13-2008, 03:15 PM Go to last post
  28. Somebody please verify the solution i have posted, am not 100% sure

    A telecom produces telephone sets in two plants: New York, and Buffalo. Daily production volumes of a certain model are : 500 and 2000 units...

    Started by messanger123434‎, 11-13-2008 12:39 PM
    • Replies: 1
    • Views: 2,095
    11-13-2008, 04:39 PM Go to last post
  29. Exclamation DeMorgans Law

    I NEED DESPRETE HELP! I'M GONNA FAIL MY CLASS IF I DON'T GET THE ANSWERS RIGHT! PLEASEEE! Heres the problem: A local TV station predicts a 80&#37;...

    Started by bettyboop1991‎, 11-13-2008 06:31 PM
    • Replies: 0
    • Views: 2,077
    11-13-2008, 06:31 PM Go to last post
  30. Squared Normal Dist

    Hello All- My problem is: Find the distribution of W=X^2 when X is N(0,4) I know that this problem is related to the fact that Z^2 =...

    Started by B_Miner‎, 11-07-2008 09:30 PM
    • Replies: 2
    • Views: 3,246
    11-13-2008, 07:40 PM Go to last post
  31. Probability model on common cold

    Here is a probabilistic model for the spread of the common cold. We have two people in a room, one of them healthy, and immune, the other sick....

    Started by bakakage‎, 11-13-2008 10:33 PM
    • Replies: 0
    • Views: 2,330
    11-13-2008, 10:33 PM Go to last post
  32. Question Question: generalization for negative binomial random variable

    Hello, I wonder if there is a know random variable which is a generalization of the negative binomial random variable. The generalization I search...

    Started by twy‎, 11-16-2008 05:48 PM
    • Replies: 0
    • Views: 2,366
    11-16-2008, 05:48 PM Go to last post
  33. I really need some small help here please.

    Hey everybody I am new here one of my friends refered me to these forums as help. SO i have 2 small problems that i will write down right now. I...

    Started by odessa101‎, 11-18-2008 08:16 PM
    • Replies: 1
    • Views: 2,920
    11-19-2008, 09:28 AM Go to last post
  34. Probability question- Are my answers correct

    Question: You are given the probabilities given below: P(A)=0.30 P(B)=0.40 P(C)=0.10 P(A or D)=0.50 P(A and D)=0.04 P(A and C)=0.03...

    Started by sweetx‎, 11-19-2008 11:32 PM
    • Replies: 0
    • Views: 2,569
    11-19-2008, 11:32 PM Go to last post
  35. Angry Statistic & Probability

    I am having problems completing assignment of 8 problems. I do not know what I am doing and I need this course to graduate in the spring. I would be...

    Started by annharris‎, 11-18-2008 02:50 PM
    • Replies: 1
    • Views: 2,961
    11-20-2008, 03:00 PM Go to last post
  36. Please help me reach the end!

    Before ya slam me let me explain. I foolishly took an online statistics course. I will be failing this class... there is nothing I can do to avoid it...

    Started by MotherBear1975‎, 11-20-2008 02:52 PM
    • Replies: 3
    • Views: 5,684
    11-20-2008, 03:37 PM Go to last post
  37. Probability of exactly one?

    Hello, I have a question that I am stuck on. Given: the probability of passing a Photography class is 75% and the probability of passing a...

    Started by vit_mar‎, 11-19-2008 06:40 PM
    • Replies: 9
    • Views: 8,209
    11-21-2008, 07:29 AM Go to last post
  38. k-sided dice

    Hi everyone, Looking for a bit of help. If i throw a k-sided dice twice, what is the expected value of their sums. I'm looking for a formula for...

    Started by waxandshine‎, 11-22-2008 06:39 AM
    • Replies: 2
    • Views: 2,735
    11-22-2008, 08:40 PM Go to last post
  39. looking for algorithm for weighted random choice

    The subject line probably doesn't quite call it what it's supposed to be called but, anyway, here's the problem: Just for the sake of argument,...

    Started by m3p‎, 11-22-2008 03:33 PM
    • Replies: 1
    • Views: 4,821
    11-23-2008, 01:02 PM Go to last post
  40. Normal distribution

    Hey guys, was wondering if you guys could help me out with this, been ok so far with my Stats at Uni but not sure what to do with these examples, can...

    Started by StatsUniStudent‎, 11-20-2008 06:20 PM
    • Replies: 2
    • Views: 2,252
    11-23-2008, 10:01 PM Go to last post
  41. Distribution Probabilities

    Here's my question with what I have done so far.. Guess I'm looking to know if I am on the right track - thanks in advance A completely confuses...

    Started by s2008‎, 11-24-2008 09:55 AM
    • Replies: 2
    • Views: 2,581
    11-24-2008, 10:18 PM Go to last post
  42. Unhappy test of significance with Poisson Distribution...

    Hello guys, well my problem is the following: I have some data that I have proved that follow the Poisson distribution using chi-squared test. Then...

    Started by nwg‎, 11-24-2008 05:25 AM
    • Replies: 2
    • Views: 6,124
    11-25-2008, 03:46 PM Go to last post
  43. Random Variables

    Haven't a clue where to start with this problem: Leona and Fed are friendly competitors in high school. Both are about to take the ACT college...

    Started by Xiomay‎, 11-25-2008 09:22 PM
    • Replies: 1
    • Views: 6,303
    11-26-2008, 12:49 AM Go to last post
  44. Calculating probability of multiple events

    This is my first post so I hope I can get my question across reasonably intelligently. I have calculated the probability of an event occurring for...

    Started by Bear47‎, 11-18-2008 10:12 AM
    • Replies: 3
    • Views: 13,435
    11-26-2008, 05:24 AM Go to last post
  45. random variables and variance

    if we let X be a (continous or discrete) random variable with range Rx how can we find Var(X)?? i dont have any clue plz help me. thx

    Started by xixihaha‎, 11-25-2008 03:08 PM
    • Replies: 4
    • Views: 3,623
    11-26-2008, 07:00 AM Go to last post
  46. Probability Question

    I was given 10 problems is my stats class and is having an issue with one. Can someone help me? Suppose n men throw their hats into a pile and...

    Started by tc11‎, 11-05-2008 08:54 PM
    • Replies: 4
    • Views: 2,596
    11-26-2008, 09:02 AM Go to last post
  47. uniform distribution

    A bus travels between Glasgow and Edinburgh, which we suppose are 78km apart. If the bus has a breakdown, the distance from breakdown to Glasgow has...

    Started by xixihaha‎, 11-25-2008 06:00 PM
    • Replies: 5
    • Views: 4,916
    11-26-2008, 09:27 AM Go to last post
  48. MLE of a Gamma Distribution

    Hello everyone, I'm having quite some trouble with a question about the maximum likelihood estimator of a gamma distribution. The question is as...

    Started by Halfpixel‎, 11-26-2008 04:44 AM
    • Replies: 2
    • Views: 28,542
    11-26-2008, 01:24 PM Go to last post
  49. standard deviation of a ratio of dependent variables

    Hi- I have a function (ratio essentially) r= x / (1-x) I need some way of expressing the error of r ... I've experimentally measured x and...

    Started by tronsister‎, 11-26-2008 04:28 PM
    • Replies: 2
    • Views: 11,912
    11-27-2008, 04:54 AM Go to last post
  50. probability game

    Hello, My friend told me about this game, a type of patience/solitaire which is seemingly impossible to complete. The idea is the following: ...

    Started by statfan‎, 11-27-2008 05:04 AM
    • Replies: 0
    • Views: 3,220
    11-27-2008, 05:04 AM Go to last post
  51. ARL - U Chart using poisson tables?

    How do you determine the average run length of a u-Chart when process is im control using Poisson tables???

    Started by axnman‎, 11-27-2008 10:58 AM
    • Replies: 0
    • Views: 2,110
    11-27-2008, 10:58 AM Go to last post
  52. how relate population to reach into tail?

    Hi, I'd really appreciate if someone could help with the following question that's been bugging me for months... If I'm working with a zero-mean...

    Started by ggk‎, 11-27-2008 01:30 PM
    • Replies: 2
    • Views: 3,379
    11-27-2008, 05:49 PM Go to last post
  53. Determining expected ranges, given correlation

    Hi, I have a question relating to whether or not (and if so, how) we can infer range of P10/P90 possible outcomes for a variable given a...

    Started by vinomarky‎, 11-27-2008 06:13 PM
    • Replies: 0
    • Views: 2,704
    11-27-2008, 06:13 PM Go to last post
  54. probability question

    The baggage handling system at an airport handles 200000 pieces of luggage a year. on average only one out of every 200000 items processed by the...

    Started by xixihaha‎, 11-27-2008 11:10 AM
    • Replies: 2
    • Views: 2,292
    11-27-2008, 08:08 PM Go to last post
  55. Variances in Predictions?

    Hi All: I am new to this forum, but glad that i have found it! I posted this in the statistics forum but it may be better suited here. ...

    Started by MCALVIN‎, 11-28-2008 12:26 PM
    • Replies: 0
    • Views: 2,732
    11-28-2008, 12:26 PM Go to last post
  56. independent and disjoint

    If C and D be independent events which are disjoint. What can we said about their probabilities?? i know C, D are independent so P(C n D)=P(C)...

    Started by xixihaha‎, 11-28-2008 03:33 PM
    • Replies: 6
    • Views: 10,048
    11-29-2008, 02:10 PM Go to last post
  57. Normal distribution Question

    Your favourite cereals come in packs in nominal weight of 375g. The filling machine that fills the packs naturally makes mistakes with quantities. It...

    Started by xixihaha‎, 11-29-2008 02:37 PM
    • Replies: 1
    • Views: 2,946
    11-30-2008, 02:38 AM Go to last post
  58. MCQ related Probability

    Here's the question: A MCQ has 100 questions. Each with four possible answer of which only one is correct answer. What is the probability that...

    Started by ruzfactor‎, 12-01-2008 06:06 AM
    • Replies: 1
    • Views: 6,164
    12-01-2008, 06:34 AM Go to last post
  59. Interesting secret santa probability problem

    Hi there, this is not a homework exercise, it's purely for my own (+colleagues') interest. We are doing a secret santa at work. The idea is that...

    Started by nottinghamjazz‎, 12-02-2008 01:09 PM
    • Replies: 0
    • Views: 3,968
    12-02-2008, 01:09 PM Go to last post
  60. Hypergeometric distribution sample size

    Dear all, I have come across a couple of formulae to calculate the sample size (n) needed to detect a given level of prevalence of a condition in...

    Started by kika18‎, 12-03-2008 06:50 AM
    • Replies: 0
    • Views: 4,290
    12-03-2008, 06:50 AM 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