1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,801
+ Post New Thread
Page 73 of 91 FirstFirst ... 23 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 88 89 90 91 LastLast
Threads 4321 to 4380 of 5449

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: 30,203
    09-30-2005, 09:44 AM Go to last post
  1. Need to see if i did this correctly... simple question

    What kinds of web sites do males aged 18 to 34 visit most often? Pronogarphic sites take first place, but about 50% of male internet users in this...

    Started by PunPride‎, 10-28-2008 09:25 PM
    • Replies: 1
    • Views: 3,366
    10-28-2008, 11:33 PM Go to last post
  2. Exponential pdf

    Hello all- Can anyone help on the meaning of the exponential distribution? The derivation I am looking at shows the cdf F(w) = P(W<=w) = 1 -...

    Started by B_Miner‎, 10-28-2008 07:39 PM
    • Replies: 1
    • Views: 3,177
    10-28-2008, 11:29 PM Go to last post
  3. Please check these.

    I) Suppose X ~ U(-1,1). Find the density of Y = X^2. My prof additionally instructed that in this question he wants us to compute the cdf first, and...

    Started by jamesmartinn‎, 10-28-2008 06:14 PM
    • Replies: 0
    • Views: 2,855
    10-28-2008, 06:14 PM Go to last post
  4. Need some help on a probabilty problem due tonight!

    I made it through all my homework pretty easily but two problems in general are bugging me. Here they are. If anyone is able to help me I'de...

    Started by gdeputy‎, 10-28-2008 05:12 PM
    • Replies: 1
    • Views: 2,583
    10-28-2008, 05:44 PM Go to last post
  5. probability homework

    Hello, I am having difficulty figuring out my homework. I made attempts and could someone check my answers and see if I'm right or make suggestions?...

    Started by letsstophere‎, 10-28-2008 08:07 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 6,630
    10-28-2008, 04:41 PM Go to last post
  6. probability question

    Hello, I am having trouble with my stat homework. Maybe someone can give me some guidance? I would really appreciate it! A woman is fishing for...

    Started by letsstophere‎, 10-21-2008 09:51 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 7,630
    10-28-2008, 04:23 PM Go to last post
  7. Unhappy Need help on something easy:(

    Nevermind, figured it out..... wont let me delete thread for some reason. Thanks anyways...

    Started by GhettoSuave‎, 10-28-2008 01:47 PM
    • Replies: 0
    • Views: 2,485
    10-28-2008, 01:47 PM Go to last post
  8. Probability Distribution

    Hello: A novice statistician here. Hopefully someone can help me with what I expect is an easy question. I'm trying to create a probability...

    Started by kgs‎, 10-07-2008 06:41 PM
    • Replies: 4
    • Views: 2,513
    10-28-2008, 01:12 PM Go to last post
  9. a defective probability problem

    I am trying real hard on solving this problem: A sample of 4 different cell phones is randomly selected from a group containing 15 that are...

    Started by carsont89‎, 10-27-2008 03:34 PM
    • Replies: 5
    • Views: 3,073
    10-28-2008, 08:47 AM Go to last post
  10. Question Please Help Me Out (I'm Desperate)

    I can't figure these 2 problems out. I'm not very good at stats, so they might be easy. Please answer, even if you only know one of them or part of...

    Started by DrPepper1‎, 10-27-2008 10:24 PM
    • Replies: 10
    • Views: 6,438
    10-28-2008, 03:06 AM Go to last post
  11. university probability problems, help much appreciated.

    Hi guys, I am really struggling with my university statistics work. Probablity has been really difficult. I have asked my tutors for help, but...

    Started by jon2008‎, 10-27-2008 05:09 PM
    • Replies: 1
    • Views: 4,219
    10-27-2008, 06:14 PM Go to last post
  12. How to apply a distribution and derive a failure rate?

    please excuse me for my newbie question. certain factors influence the power requirements for my system which comprises of several components. i...

    Started by ChootarLaal‎, 10-27-2008 10:28 AM
    • Replies: 4
    • Views: 4,895
    10-27-2008, 01:18 PM Go to last post
  13. A Drunkard's Random Walk

    Here's a homework problem that I need a hint to get started. D drunkard is taking a random walk. he canstep north or shouth with probability .5...

    Started by statsmom‎, 10-25-2008 11:24 PM
    • Replies: 3
    • Views: 4,777
    10-26-2008, 10:04 PM Go to last post
  14. probability

    The ones in red are the ones i have confused. would they be conditional probability therefore would the equation be P (A/B) = P (A and B)/P...

    Started by shezza76‎, 10-26-2008 05:59 PM
    • Replies: 1
    • Views: 1,787
    10-26-2008, 06:34 PM Go to last post
  15. Uniform Variable

    Can someone please help with the below problem? Derive the probability density function of X=U^2, where U is uniform on (0,1) Where do I even...

    Started by tc11‎, 10-26-2008 04:34 PM
    • Replies: 1
    • Views: 2,434
    10-26-2008, 05:29 PM Go to last post
  16. Ztable probability, Please Help

    Im looking back over an old assignment and I cant figure out how to get the correct probability Question: what is the probability of encountering...

    Started by cmf0106‎, 10-26-2008 02:14 PM
    • Replies: 3
    • Views: 2,250
    10-26-2008, 02:37 PM Go to last post
  17. transformation of distributions

    Here is a question: Consider a uniform variable U on (0,1) and define the variable X=e^u. Find the distribution of X. Here is the work I've...

    Started by anna_s‎, 10-26-2008 08:44 AM
    • Replies: 6
    • Views: 2,255
    10-26-2008, 01:41 PM Go to last post
  18. one or two tailed?

    Ok, so i know when testing to determine if say a drug umproves some fuction, the null and alternate hypothesis would not be two tailed. But, if im...

    Started by acarnle1‎, 10-26-2008 09:29 AM
    • Replies: 1
    • Views: 2,568
    10-26-2008, 10:43 AM Go to last post
  19. I am stuck on this one

    It was reported in a medical journal that about 70% of the individuals needinf a kidney transplant find a suitable donor when they turn to registries...

    Started by jlhunt30‎, 10-25-2008 02:42 PM
    • Replies: 1
    • Views: 1,897
    10-25-2008, 03:27 PM Go to last post
  20. Question

    A computer program produces a random integer between 0 and 9 (inclusive). Find the Probability that the integer is a number at least a 3. I got the...

    Started by jlhunt30‎, 10-25-2008 01:43 PM
    • Replies: 1
    • Views: 1,926
    10-25-2008, 01:46 PM Go to last post
  21. probability question im having trouble with

    1. A system contains 2 identical pumps 1 and 2, if one pump fails the system will still operate however because of the added strain the other pump is...

    Started by mattg‎, 10-14-2008 04:33 PM
    • Replies: 1
    • Views: 6,802
    10-24-2008, 07:17 PM Go to last post
  22. simple probability question

    Hi there, Suppose X~Exp(m) and Y~Bernoulli with P(Y=1|X=x)=exp(b0+b1*x)/(1+exp(b0+b1*x)). I want to find P(Y=1|X>c) where c is a constant. ...

    Started by leo nidas‎, 10-22-2008 12:40 PM
    • Replies: 2
    • Views: 3,248
    10-24-2008, 01:25 PM Go to last post
  23. Need help with a basic probability question...

    70&#37; of all Super Food stores decided to advertise in their local newspapers. Of those stores that advertised in their local newspapers, 60% had an...

    Started by PunPride‎, 10-24-2008 12:40 PM
    • Replies: 2
    • Views: 2,472
    10-24-2008, 12:53 PM Go to last post
  24. Matching Numbers from two baskets

    Hey guys, I would very much appreciate your help here, as I'm stuck with this problem since a couple of evenings now: I have an interval of...

    Started by bastainbrice‎, 10-23-2008 12:10 PM
    • Replies: 2
    • Views: 2,118
    10-24-2008, 02:28 AM Go to last post
  25. Standard Normal Transformation

    f(x) = 1/sqrt(2pi) exp(-1/2* x^2) Find the Density of Y = |X| P(Y =< y) = P(-y =< x =< y) = integral from (y, -y) of f(x) dx. I'm not sure...

    Started by jamesmartinn‎, 10-23-2008 08:53 PM
    • Replies: 1
    • Views: 3,227
    10-24-2008, 12:56 AM Go to last post
  26. Help with a few probability problems

    Im having trouble figuring out follow two problems. I cant seem to get the problems with "or" or "given" in them. Could you'll please explain how to...

    Started by xal951‎, 10-18-2008 10:15 PM
    • Replies: 1
    • Views: 2,974
    10-23-2008, 11:57 AM Go to last post
  27. Discrete random variable

    Here is a problem given : Let X equal the number of flips of a fair coin that are required to observe heads-tails on consecutive flips. Need to...

    Started by B_Miner‎, 10-17-2008 07:25 AM
    • Replies: 1
    • Views: 4,091
    10-23-2008, 10:27 AM Go to last post
  28. Bunch of questions (just need help not answers)

    Like the title says, I have a bunch of problems that I don't know how to solve. I learn from looking at examples and trying to figure it out (this...

    Started by pensfan10‎, 10-16-2008 02:07 PM
    • Replies: 9
    • Views: 4,903
    10-23-2008, 10:01 AM Go to last post
  29. Flipping coin

    http://www-stat.stanford.edu/~serban/116/pfin3.pdf How do they derive E(X|H) and E(X|T) in 6(d)? I try Bayes formula but I cant get the same...

    Started by iamsevenup‎, 10-22-2008 01:20 AM
    • Replies: 1
    • Views: 2,818
    10-23-2008, 09:44 AM Go to last post
  30. Poisson variables and normal approximation

    I am attaching the questions and my work. It was too difficult to write the formulas in the post. I think I am on the right track - just a little...

    Started by anna_s‎, 10-22-2008 08:50 PM
    • Replies: 1
    • Views: 2,488
    10-23-2008, 06:41 AM Go to last post
  31. Unhappy probability Homework help please

    I have a stats probability problem for homework. It is a chart showing a survey of patients regarding satisfaction with care and type of surgery. ...

    Started by strugglingwstats‎, 10-21-2008 07:09 PM
    • Replies: 2
    • Views: 8,195
    10-22-2008, 07:05 AM Go to last post
  32. Poisson

    Suppose that the number of light absorbing molecules or particles along the path of a ray of light entering a body of water is poisson. The...

    Started by mindy‎, 10-21-2008 10:03 PM
    • Replies: 1
    • Views: 2,908
    10-22-2008, 02:59 AM Go to last post
  33. Probability Question

    Q 1: A teacher walks, cycles or drives to school with probabilities 0.1, 0.3 and 0.6 respectively. If she walks to school she has a probability of...

    Started by AMI‎, 10-20-2008 05:17 AM
    • Replies: 6
    • Views: 4,868
    10-21-2008, 10:19 PM Go to last post
  34. Standard deviation from three gaussians

    2 problems. How does one find a standard deviation from three convoluted gaussians. This has come up in two contexts that I have considered...

    Started by tigerstripedcat‎, 10-20-2008 12:39 PM
    • Replies: 1
    • Views: 2,114
    10-20-2008, 01:51 PM Go to last post
  35. probability help greatly needed

    Alright I've got a probability test coming up and our professor gaves us a work sheet with 30+ problems to review and these are some I'm having...

    Started by oomanamemni‎, 10-20-2008 01:00 PM
    • Replies: 1
    • Views: 2,840
    10-20-2008, 01:26 PM Go to last post
  36. Poisson distribution...have you any ideas?

    While away from the office for an hour, a lecturer receives an average of six telephone calls. i)What conditions must be satisfied if the number...

    Started by blackjesus13‎, 10-19-2008 03:31 AM
    • Replies: 1
    • Views: 1,928
    10-20-2008, 11:45 AM Go to last post
  37. Very easy question for you...help

    Assume that the rate of return on projects is a random variable having a normal distribution with standard deviation = 0.05 per cent. If a bank...

    Started by blackjesus13‎, 10-19-2008 03:29 AM
    • Replies: 6
    • Views: 2,839
    10-20-2008, 11:10 AM Go to last post
  38. Binomial Formula ?

    Hi everyone, I'm absolutely going crazy trying to figure this problem out, and I know the answer LOL..I just can't figure out how they got it. Using...

    Started by desmoface‎, 10-18-2008 11:54 AM
    • Replies: 12
    • Views: 3,561
    10-19-2008, 10:25 PM Go to last post
  39. Conditional Probability

    I am having a very hard time with this one problem, I did a search on the site but came up empty so I'm sorry if this is a repost. Last semester,...

    Started by Spiff321‎, 10-19-2008 03:30 PM
    • Replies: 2
    • Views: 2,355
    10-19-2008, 04:49 PM Go to last post
  40. Continuous Random Variance

    Assume that x is a binomial random variable with n=1000 and p=0.5 Find the following probabilities: P(x >500) So mu=np=1000x0.5= 500 ...

    Started by n77ler‎, 10-19-2008 09:44 AM
    • Replies: 1
    • Views: 4,070
    10-19-2008, 01:02 PM Go to last post
  41. Moment Generating Functions

    This is my first time posting. We just started this and I am completely lost. The problem is to find the mean, variance and the pdf of a random...

    Started by statsmom‎, 10-19-2008 12:03 PM
    • Replies: 1
    • Views: 2,193
    10-19-2008, 12:21 PM Go to last post
  42. Cool true hypothesis and errors??

    Ok...so i have a sample problem that asks to describe the circumstances under which a researcher would make a Type I and or Type II error in the...

    Started by acarnle1‎, 10-18-2008 04:20 PM
    • Replies: 2
    • Views: 1,599
    10-19-2008, 07:26 AM Go to last post
  43. Binomial Random Variable

    A study of gambling activity at the university of west georgia discovered that 60% of the male students wagered on sports the previous year. Consider...

    Started by n77ler‎, 10-18-2008 05:23 PM
    • Replies: 1
    • Views: 3,072
    10-18-2008, 06:54 PM Go to last post
  44. risk

    Hi, sorry if may be a stupid question, but I have a such an elementary doubt: let you suppose that a certain distribution (for example triangular:...

    Started by giordy‎, 10-18-2008 02:44 AM
    • Replies: 4
    • Views: 2,506
    10-18-2008, 12:50 PM Go to last post
  45. Outlier in a small population

    Hi, My question is about an outlier in a small population. I was studying the telecommunication sector in Australia. For this example, let us...

    Started by musicgold‎, 10-13-2008 01:38 AM
    • Replies: 3
    • Views: 3,119
    10-18-2008, 10:00 AM Go to last post
  46. Do you think you can solve this problem? (I'm a beginner..please help..)

    Hi guys, I have no idea how to solve this problem...can anyone give me some piece of advice. (please..) If the probability density of X is...

    Started by blackjesus13‎, 10-18-2008 03:14 AM
    • Replies: 1
    • Views: 2,040
    10-18-2008, 09:07 AM Go to last post
  47. Probability..not sure if I am using the correct theory;

    I am at my wits end....I have smoked 1000 cigarettes, on the verge of tears and have been up all night trying to determine what formula to use to...

    Started by persephone‎, 10-18-2008 05:46 AM
    • Replies: 1
    • Views: 2,951
    10-18-2008, 09:05 AM Go to last post
  48. First time taking stats, need some help.. tried on my own still stuck!!

    This is my first year taking stats. I have a ton of homework this weekend, I was able to do most of it but I'm stuck on these questions... 1. How...

    Started by durrs‎, 10-17-2008 02:42 PM
    • Replies: 3
    • Views: 2,872
    10-18-2008, 01:11 AM Go to last post
  49. Probability dealing with sample proportion

    I know how to compute the sample mean but I have a problem dealing with sample proportion. The problem is compute the probability that another...

    Started by tiffnnie01‎, 10-16-2008 11:49 AM
    • Replies: 1
    • Views: 4,527
    10-16-2008, 01:06 PM Go to last post
  50. Z-scores for probability in tails

    I haven't done any stats in years and now I am in a course for my grad program and I am so lost. My teacher is very confusing and I am trying my best...

    Started by rmbr2‎, 10-02-2008 01:18 PM
    • Replies: 3
    • Views: 23,901
    10-16-2008, 06:45 AM Go to last post
  51. Find the value of x

    I am having trouble finding the value of x with this problem, because my teacher's example problems are a lot different! The question is A new...

    Started by tiffnnie01‎, 10-15-2008 03:06 PM
    • Replies: 1
    • Views: 10,467
    10-15-2008, 10:18 PM Go to last post
  52. Null and alternate hypothesis

    Hi- I have a problem that begins, "Suppose you wish to test the null hypthesis that u=50 vs the alternate hypothesis that u<50...."and then it goes...

    Started by acarnle1‎, 10-15-2008 08:48 PM
    • Replies: 1
    • Views: 2,851
    10-15-2008, 09:49 PM Go to last post
  53. probability mass function

    You have 4 red jelly beans and 4 green jelly beans in a paper bag. Without looking, you will pick jelly beans, one at a time, from the bag and stop...

    Started by jamesmartinn‎, 10-15-2008 09:45 PM
    • Replies: 0
    • Views: 3,185
    10-15-2008, 09:45 PM Go to last post
  54. Another problem for maximizing profit...

    Consider a store owner who buys items one day for $1.00 and sells them the same day for $1.50. Assume the item has no value the next day and that...

    Started by turd112‎, 10-15-2008 04:55 PM
    • Replies: 0
    • Views: 2,660
    10-15-2008, 04:55 PM Go to last post
  55. maximizing profit given pdf

    Here is the problem I came across while studying for the test and need some help: A retail grocer has a daily demand, Y for a certain product sold...

    Started by anna_s‎, 10-14-2008 08:34 AM
    • Replies: 2
    • Views: 6,665
    10-14-2008, 02:16 PM Go to last post
  56. Conditional Probabillity- Check my work?

    Ok the problem goes like this: A small brewery has two bottling machines A & B. Machine A bottles 75% of all their bottles, and B bottles 25%. One...

    Started by KitsuMathTard‎, 10-12-2008 06:37 PM
    • Replies: 7
    • Views: 3,020
    10-13-2008, 04:49 PM Go to last post
  57. Transformations of Random Variables

    Suppose X ~ U(-1,2). find the density of X^2 My soln so far: f(x)x = (1/3, -1<x<2. 0 elsewhere) My teacher tells us to find the CDF, then...

    Started by jamesmartinn‎, 10-09-2008 05:13 PM
    • Replies: 4
    • Views: 2,801
    10-12-2008, 05:06 PM Go to last post
  58. Infinite sum

    Hi All- It has been a few years since my last calc class and now I am taking a course in mathematical stats. I have the discrete data pmf:...

    Started by B_Miner‎, 10-11-2008 08:17 PM
    • Replies: 4
    • Views: 3,089
    10-12-2008, 02:06 PM Go to last post
  59. Type II error

    I'm currently doing a statistics assigment. In one of the questions, i've been asked to "discuss" what the probability of a Type II error, what i...

    Started by resonance‎, 10-09-2008 07:00 PM
    • Replies: 10
    • Views: 7,386
    10-12-2008, 10:47 AM Go to last post
  60. Independent Events Occurring Simultaniously

    This should be an easy one for you smart guys: Consider a double computer intruder detection system (IDS) with system A and system B. If there is...

    Started by KitsuMathTard‎, 10-08-2008 09:18 PM
    • Replies: 6
    • Views: 8,980
    10-10-2008, 07:48 AM 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