1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,872
+ Post New Thread
Page 68 of 91 FirstFirst ... 18 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 ... LastLast
Threads 4021 to 4080 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: 30,311
    09-30-2005, 09:44 AM Go to last post
  1. Please Help - Probability Question

    A statistical analysis of 1,000 long-distance telephone calls made from the headquarters of the Bricks and Clicks Computer-corporation indicates that...

    Started by shortmikeshortt‎, 04-26-2009 01:29 AM
    • Replies: 1
    • Views: 7,404
    04-26-2009, 04:21 AM Go to last post
  2. Confusion over Expected Conditional Value

    I've recently read that for a random variable X, "the expected value of the negative values of X is the expected value of X conditioned on X being...

    Started by ts96‎, 04-23-2009 03:05 PM
    • Replies: 0
    • Views: 2,810
    04-23-2009, 03:05 PM Go to last post
  3. Standard Deviation in Probability

    I'm having troubles with this probability question... The weights of apples in a large crate have a Normal distribution with μ = 138 grams and σ =...

    Started by girugamesh‎, 04-22-2009 11:03 PM
    • Replies: 3
    • Views: 5,391
    04-23-2009, 12:29 AM Go to last post
  4. Mathematical Statistics - Bayesian Estimate

    Hi, I don't know if this is beyond what is done in this forum but I am looking for some help. Any hints or ways to approach this problem would be...

    Started by statsman91‎, 04-18-2009 12:09 PM
    • Replies: 2
    • Views: 3,296
    04-20-2009, 05:02 PM Go to last post
  5. Confidence Intervals 101

    Hi guys, I have a simple question - at least for some of you. Why do we substitute 0.25 when determining sample size without any prior estimates?

    Started by rhetoricone‎, 04-20-2009 09:21 AM
    • Replies: 0
    • Views: 2,403
    04-20-2009, 09:21 AM Go to last post
  6. Bayesian posterior

    Hi I am trying to put together a Bayes posterior distribution. I must have made a mistake because I am not able to manipulate the variables into...

    Started by PeterVincent‎, 04-20-2009 08:39 AM
    • Replies: 0
    • Views: 2,383
    04-20-2009, 08:39 AM Go to last post
  7. Tricky Extra Credit Problem

    Hey we just received this funny problem as extra credit: I know this isn't a poisson distribution because we are dealing with 2-dimensions...

    Started by skizzouk‎, 04-20-2009 08:25 AM
    • Replies: 0
    • Views: 2,412
    04-20-2009, 08:25 AM Go to last post
  8. Bionomial Distribution question

    Am I on the right track or close????? I have been working all day to figure this question out If 60% of voters favor new ball park: A. If...

    Started by thagentleman‎, 04-19-2009 05:45 PM
    • Replies: 2
    • Views: 2,843
    04-19-2009, 11:07 PM Go to last post
  9. Exclamation Problem help please!

    I don't understand how to solve this problem. Please help! Thanks in advance A common design requirement is that an item (such as an aircraft or...

    Started by ineedmathhelp‎, 04-19-2009 07:30 PM
    • Replies: 3
    • Views: 9,893
    04-19-2009, 10:53 PM Go to last post
  10. counting tree?

    Here is a problem I need help with: A USA Today national survey of heads of households found that 24% of women had asked for a raise, and of those...

    Started by ruthlathe‎, 04-15-2009 08:51 PM
    • Replies: 2
    • Views: 3,479
    04-18-2009, 02:33 PM Go to last post
  11. Distributions

    shuffle a deck of 52 cards turn over one top card until you reach the first ACE. find the E(X).

    Started by brazil09‎, 04-16-2009 02:57 PM
    • Replies: 1
    • Views: 2,286
    04-16-2009, 07:59 PM Go to last post
  12. Coin Filpping Probability

    I am trying to review for a test for my Probability course. This question is on myu review and I was wondering if anyone could help me with it? ...

    Started by rmn1123‎, 04-15-2009 08:40 PM
    • Replies: 1
    • Views: 2,705
    04-16-2009, 01:12 PM Go to last post
  13. Permutation Problem(?)

    Here is the info, followed by a few problems. I got one correct, but can't figure the others: A study conducted by the A.C. Nielsen Company found...

    Started by ruthlathe‎, 04-15-2009 08:48 PM
    • Replies: 1
    • Views: 2,308
    04-15-2009, 10:20 PM Go to last post
  14. Talking Calculating the Odds of Winning

    I'm trying to calculate the odds of winning a promitional event. The game is as follows: There will be 50 envelopes each with a poker card in it....

    Started by NinerLoyal‎, 04-15-2009 10:47 AM
    • Replies: 0
    • Views: 2,288
    04-15-2009, 10:47 AM Go to last post
  15. Poisson Distribution(Homicide Deaths)

    Hi, I have attempted the following question. Half I could solve, I need help to complete it. Question In one year, there were 116 homicide deaths...

    Started by Thakur‎, 04-14-2009 03:57 PM
    • Replies: 1
    • Views: 8,500
    04-14-2009, 09:01 PM Go to last post
  16. Sum on k dice

    I'm currently working on a research project on the game of Plinko and I'm trying to go about modeling the winnings with taking into account how many...

    Started by redone632‎, 04-14-2009 12:35 PM
    • Replies: 1
    • Views: 2,620
    04-14-2009, 02:22 PM Go to last post
  17. Hypergeometric Probability Calculation

    Hi, I was hoping that someone can help me do this calculation. List 1: 400 markers drawn from a sample of 4067 List 2: 145 markers drawn from a...

    Started by psanders82‎, 04-12-2009 11:33 PM
    • Replies: 0
    • Views: 2,289
    04-12-2009, 11:33 PM Go to last post
  18. Homework help pls!

    Hi, i need some help on my homework which is due tml. Here goes: Let X1,..., Xn be i.i.d. U(0,theta) random variables. Let Yn be the maximum of...

    Started by Questions‎, 04-12-2009 01:45 PM
    • Replies: 0
    • Views: 2,383
    04-12-2009, 01:45 PM Go to last post
  19. queueing theory

    I'm interested in this problem. Let N be the number of customers in the queueing system at steady state. I know how to find the distribution of N for...

    Started by PvtBillPilgrim‎, 04-10-2009 06:28 PM
    • Replies: 0
    • Views: 2,582
    04-10-2009, 06:28 PM Go to last post
  20. Pure death process

    http://books.google.ca/books?id=mwW-iODttSQC&pg=PA299&lpg=PA299&dq=%22pure+death+process%22&source=bl&ots=KxKOvTtjsA&sig=PEgrUPkeCQiZ0U_s8JIkWClBi6A&h...

    Started by PvtBillPilgrim‎, 04-10-2009 12:40 PM
    • Replies: 0
    • Views: 3,623
    04-10-2009, 12:40 PM Go to last post
  21. uniform random variables, max, sequence

    -qn solved-

    Started by azazaz‎, 04-10-2009 08:45 AM
    • Replies: 0
    • Views: 2,109
    04-10-2009, 08:45 AM Go to last post
  22. limits and independent rvs

    Let X_1, X_2,... be a sequence of independent r.v.'s with EX_i = miu_i, Var(X_i) = (sigma_i)^2, i= 1, 2,.... Assume that: i) lim n-> inf (...

    Started by azazaz‎, 04-08-2009 08:52 AM
    • Replies: 2
    • Views: 5,058
    04-10-2009, 08:30 AM Go to last post
  23. probability from moment generating function?

    if the moment generating of a random variable X is M_x(t)=(1-t)^-2 compute P(-2 < X < 3) or explain why it cannot be computed how do I do...

    Started by azazaz‎, 04-08-2009 08:14 AM
    • Replies: 4
    • Views: 6,564
    04-10-2009, 08:27 AM Go to last post
  24. Finding the conditional expected value

    Hi guys, I am attempting a question where X and Y have uniform distribution over a circle X^2 + Y^2 = 9. And I am required to find the E. I've...

    Started by kakarot22‎, 04-07-2009 07:36 AM
    • Replies: 3
    • Views: 3,320
    04-09-2009, 10:32 AM Go to last post
  25. Probability Question Help

    delete thread

    Started by mmmail69‎, 04-09-2009 03:19 AM
    • Replies: 0
    • Views: 4,007
    04-09-2009, 03:19 AM Go to last post
  26. Once again, simple help

    What is the Phi greek letter used for in statistics. I am using it for random variables and the context is phi(a number). I have a given mean and...

    Started by yearscount2zero‎, 04-08-2009 08:50 AM
    • Replies: 2
    • Views: 2,871
    04-08-2009, 11:58 PM Go to last post
  27. please help me check my work!

    Thank you. +10 marbles, 7 are red. If 2 are selected at random, what is the probability that at least one is red? I multiplied 7/10 (the red) by...

    Started by edused‎, 04-08-2009 06:58 PM
    • Replies: 0
    • Views: 2,188
    04-08-2009, 06:58 PM Go to last post
  28. Sampling Distributions for Proportions Question Help

    Hi, I am trying to work on this question, but I cant seem to figure it out. Help would be appreciated. Q: Of American high school students, 41%...

    Started by Penguins_Fan‎, 04-08-2009 11:09 AM
    • Replies: 0
    • Views: 2,359
    04-08-2009, 11:09 AM Go to last post
  29. Study help, discrete random variables

    1. Assume that a process of producing fiber optic cables has probability of 0.05 that a newly-produced cable (of a certain length, say 100 meters)...

    Started by yearscount2zero‎, 04-07-2009 10:08 PM
    • Replies: 2
    • Views: 2,713
    04-07-2009, 10:47 PM Go to last post
  30. Hypergeometric formula to check

    Hi, can someone check this formula for me please. I have population of 40 (numbered 1-40) and I want to get a sample of 6. I want to know the...

    Started by richacm‎, 04-01-2009 03:16 PM
    • Replies: 1
    • Views: 2,091
    04-07-2009, 05:56 PM Go to last post
  31. bayes theorem DNA statistics

    A crime is committed in an isolated commnity and a single bloodstain is left at the scene of the crime. In this community, 74&#37; of the adult male...

    Started by redrottweiller‎, 04-07-2009 02:03 PM
    • Replies: 0
    • Views: 3,009
    04-07-2009, 02:03 PM Go to last post
  32. Moment generating function help

    hi any one can provide help with this or any suggestion on how to approach the question? much thanks!

    Started by nooky‎, 04-06-2009 09:03 PM
    • Replies: 1
    • Views: 2,990
    04-07-2009, 11:17 AM Go to last post
  33. Really don't know how to approach these problems...(Normal Distribution)

    I'd like to preface this thread by stating that statistics isn't my strongest subject; I've never been a great math student. I've never had a...

    Started by michaelbluth‎, 04-06-2009 08:47 PM
    • Replies: 0
    • Views: 1,985
    04-06-2009, 08:47 PM Go to last post
  34. Infer the best time of day to call?

    I work for a non-profit. We do courtesy calls (no telemarketing) to our existing constituents. Half the calls end up in answering machines. To be...

    Started by andrewz‎, 04-06-2009 06:07 PM
    • Replies: 0
    • Views: 2,859
    04-06-2009, 06:07 PM Go to last post
  35. Normal/Binomial Distribution question

    Hey guys, I was hoping someone could help me out with this question that I've been stuck on for a few days now. "Shorty's muffler advertises...

    Started by nataher‎, 04-06-2009 02:52 PM
    • Replies: 0
    • Views: 6,893
    04-06-2009, 02:52 PM Go to last post
  36. Joint PDF - Limits of Integration

    Given f(x, y) = c(y^2 - x^2)e^-y with -y <= x <= y, 0 < y < infinity Find P(Y + X^2 <= 1/4) I'm just wondering about the limits of...

    Started by pehrelmania‎, 04-05-2009 02:05 AM
    • Replies: 1
    • Views: 3,822
    04-06-2009, 10:26 AM Go to last post
  37. Poisson Distribution

    Hi all, it's me again! Just got a quick question here with the poisson distribution. Suppose messages arrive at a voice mail system according to a...

    Started by jamesmartinn‎, 04-03-2009 06:48 PM
    • Replies: 4
    • Views: 4,774
    04-06-2009, 10:23 AM Go to last post
  38. 5% uniform random noise

    Can someone describe what 5% uniform random noise is?

    Started by freebird2008‎, 04-06-2009 10:01 AM
    • Replies: 0
    • Views: 2,757
    04-06-2009, 10:01 AM Go to last post
  39. Moment generating function

    Given: f(y) = exp(-y). y > 0 Find the m.g.f of lnY. And specify the range of t. I got to that moment of lnY is E = E and then i tried to...

    Started by pehrelmania‎, 04-06-2009 03:56 AM
    • Replies: 0
    • Views: 2,355
    04-06-2009, 03:56 AM Go to last post
  40. Independent Poisson R.v.'s

    A and B are independent poisson r.v's. with means a and b respectively. What's the conditional distribution of A given A + B? I'm aware of how to...

    Started by pehrelmania‎, 04-06-2009 12:38 AM
    • Replies: 2
    • Views: 1,987
    04-06-2009, 03:31 AM Go to last post
  41. Question about use of Kernel probability Distribution

    Hello everyone, I had a general question on the use of kernel probability density estimation for one dimensional data. I want to apply it to my...

    Started by chemnerd1‎, 04-05-2009 08:35 PM
    • Replies: 0
    • Views: 2,388
    04-05-2009, 08:35 PM Go to last post
  42. Variance?

    Hi All, In an assembly-line production of industrial robots, gearbox assemblies can be installed in one minute each if holes have been properly...

    Started by MonitorStats‎, 04-05-2009 10:59 AM
    • Replies: 0
    • Views: 4,802
    04-05-2009, 10:59 AM Go to last post
  43. Help to find the joint density function.

    Hi, Can someone please help me find the joint density function f(y1,y2) for the given problem. Suppose that Y1 and Y2 are uniformly distributed...

    Started by MonitorStats‎, 04-04-2009 06:32 AM
    • Replies: 3
    • Views: 10,058
    04-04-2009, 11:59 PM Go to last post
  44. Hypergeometric distribution

    Hi, The problem is- A shipment of 20 cameras includes 3 that are defective. What is the minimum number of cameras that must be selected if we...

    Started by MonitorStats‎, 04-04-2009 10:26 PM
    • Replies: 1
    • Views: 6,359
    04-04-2009, 11:49 PM Go to last post
  45. Finding constant k in a poisson distribution

    Hi, I am stuck with this problem and looking wodering if anyone has a suggestion. I got a truncated poisson density function: P(x) = k *...

    Started by kakarot22‎, 04-02-2009 09:00 PM
    • Replies: 1
    • Views: 3,363
    04-04-2009, 10:26 AM Go to last post
  46. Fishers Exact Test?

    Hi All! I'm on the last question of a multi step problem and I'm not sure how to do it. Suppose we take a simple random sample of 10 members of...

    Started by jamesmartinn‎, 04-04-2009 04:24 AM
    • Replies: 0
    • Views: 2,586
    04-04-2009, 04:24 AM Go to last post
  47. Can I calculate a p-value here?

    Hey everyone! Ok so I ran a biochemistry experiment the other day and I wanted to calculate a p-value for my data. The experiment is pretty...

    Started by chemnerd1‎, 04-02-2009 03:19 AM
    • Replies: 2
    • Views: 7,399
    04-02-2009, 04:47 PM Go to last post
  48. Mr

    Need to simultaneneously compare child-woman ratios of two censuses presented in 2 (4*7) tables;4 educational categories and 7 age-groups. Any...

    Started by MAYSAL‎, 03-31-2009 06:04 PM
    • Replies: 5
    • Views: 2,404
    04-01-2009, 04:56 PM Go to last post
  49. Confidence intervals (or regions?) in an opinion poll analysis

    Hi, I have a question about confidence intervals (or regions?) used with opinion poll results. I made a poll with three different possible...

    Started by Finn the Statistician‎, 04-01-2009 04:40 AM
    • Replies: 0
    • Views: 2,023
    04-01-2009, 04:40 AM Go to last post
  50. Percentile??

    Exam scores were normal in BIO 200. Jason's exam score was one standard deviation above the mean. What percentile is he in? I do not know where to...

    Started by staffordsc‎, 03-30-2009 09:19 PM
    • Replies: 1
    • Views: 4,254
    03-31-2009, 01:41 AM Go to last post
  51. How can I find E[max Xi \ X1<X2<X3] ????

    If Xi , i = 1, 2, 3, are independent exponential random variables with rate lambda_i, i=1, 2, 3 find E :conditioning problem How can I proof that...

    Started by Kui‎, 03-30-2009 08:08 AM
    • Replies: 0
    • Views: 5,435
    03-30-2009, 08:08 AM Go to last post
  52. Distribution help

    Hi, help with any of these is greatly appreciated. n=sample, p= probability x = random sample from n how to find: the chance that x is...

    Started by VANcity‎, 03-29-2009 01:50 AM
    • Replies: 1
    • Views: 2,118
    03-30-2009, 01:44 AM Go to last post
  53. Conditional Expected Value

    Given: x = N(0,1) y = N(0,1) z = N(0,1) *x,y, and z are statistically independent That is, x, y, and z are all normally distributed with mean 0...

    Started by shmiv04‎, 03-29-2009 09:20 PM
    • Replies: 3
    • Views: 3,612
    03-30-2009, 01:09 AM Go to last post
  54. Geometric Distribution Qs. Please help.

    Hi everyone, My question is- If Y denotes a geometric random variable with probability of success p, then show that for a positive integer a,...

    Started by MonitorStats‎, 03-27-2009 11:49 PM
    • Replies: 2
    • Views: 9,084
    03-29-2009, 12:49 AM Go to last post
  55. pdf of sigma x^2 for sample from normal distribution

    I have a sample from a normal distribution N(0,theta) and am trying to show that s=sigma x^2 is a sufficient statistic. To do this I am trying to...

    Started by irateelf‎, 03-29-2009 12:06 AM
    • Replies: 0
    • Views: 3,856
    03-29-2009, 12:06 AM Go to last post
  56. Unhappy How can you simplify or approximate (p - 1)!/([p^(x-1)](p-x)!)?

    Essentially I need to compute the values of (x - 1)!/((x - p)!) for p = 61,113,205 (population of UK) and x = 1, 2, 3, ... p This should show the...

    Started by tuna‎, 03-28-2009 03:30 PM
    • Replies: 3
    • Views: 4,227
    03-28-2009, 04:30 PM Go to last post
  57. Exclamation exponential distribution problem please help

    ok, so the question says that a teller at a bank were found to follow a exponentail distribution with a mean of 3.2minutes. A customer arrive at...

    Started by th3plan‎, 03-28-2009 12:10 AM
    • Replies: 1
    • Views: 3,219
    03-28-2009, 12:38 AM Go to last post
  58. Picking a ball you've picked before

    Let's say there's a bag with P balls and each time you pick a ball, you choose one ball at random and put it back in the bag afterwards. What...

    Started by tuna‎, 03-27-2009 12:11 AM
    • Replies: 2
    • Views: 3,055
    03-27-2009, 01:07 PM Go to last post
  59. probabilty question

    a test consists of 10 multiple choice questions, each with five possible answers, one of which is correct. To pass the test a student must get 60% or...

    Started by rdahl0807‎, 03-22-2009 10:28 PM
    • Replies: 1
    • Views: 2,714
    03-26-2009, 04:21 PM Go to last post
  60. Am I doing this right?

    Here is the problem: According to an opinion poll, 905 of 1393 americans polled believe that america is ready for a woman president. If the...

    Started by skatertink06‎, 03-26-2009 12:43 PM
    • Replies: 0
    • Views: 2,303
    03-26-2009, 12:43 PM Go to last post

+ Post New Thread

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