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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: 30,330
    09-30-2005, 09:44 AM Go to last post
  1. Newbie needs cheating probability

    Hello, I am hoping someone could shed some light on the following problem; I sure hope I explain it well enough. Student A and B are both...

    Started by jworth94‎, 02-02-2006 10:15 PM
    • Replies: 7
    • Views: 3,079
    02-04-2006, 09:02 PM Go to last post
  2. Probability/Normal Distribution Table

    Just want to check that I am on the right track: Find the probablility that "a" is greater than 0% mean = 13.4% standard deviation = 20% Z =...

    Started by MissNJ‎, 02-02-2006 11:41 PM
    • Replies: 2
    • Views: 3,872
    02-02-2006, 11:56 PM Go to last post
  3. Question Facing A Manufacturing Shut Down

    OK. Last question for the day. I have completed three others on my own. I am stuck on this one. A purchasing agent placed rush orders with...

    Started by Parillamaster‎, 02-02-2006 04:14 PM
    • Replies: 3
    • Views: 2,466
    02-02-2006, 04:35 PM Go to last post
  4. probability question help

    I need help with this question: A computer company receives large shipments of microprocessors. It must ensure that the proportion of them that are...

    Started by bighippo‎, 02-02-2006 02:23 PM
    • Replies: 1
    • Views: 2,621
    02-02-2006, 03:31 PM Go to last post
  5. US Naval Academy - Annapolis Question

    I am old (over 40). The last math type class I took was 23 years ago at Purdue (MA 153), intro to algebra and trig. I am having a tough time...

    Started by Parillamaster‎, 02-02-2006 10:26 AM
    • Replies: 3
    • Views: 4,979
    02-02-2006, 02:16 PM Go to last post
  6. Football Problem

    2001 NCAA Poll Will Big 10 or Pac 10 have a team in the Rose Bowl? 13,429 respondents 2961 said Big 10 4494 said Pac 10 6823 said neither ...

    Started by Parillamaster‎, 01-31-2006 02:26 PM
    • Replies: 2
    • Views: 2,884
    02-02-2006, 10:27 AM Go to last post
  7. Pizza toppings problem

    Ok - first, let me state the questions, then what I did. Suppose that a pizza shop offers ten different toppings for its pizzas, and you select...

    Started by panz‎, 01-30-2006 12:45 PM
    • Replies: 3
    • Views: 8,621
    02-01-2006, 11:43 AM Go to last post
  8. Mixed Poisson Distribution

    Since the question contains many mathematical symbols, it's in an image file attached at the bottom. What I don't get is the integral part. Why...

    Started by macro90‎, 01-24-2006 03:36 AM
    • Replies: 1
    • Views: 3,486
    01-31-2006, 11:26 PM Go to last post
  9. PDF and Mean

    I have a couple of question here I can't figure out. Does anyone know how to prove these? And can you explain why? Find the probability density...

    Started by congers@yoeric.com‎, 01-31-2006 10:57 AM
    • Replies: 1
    • Views: 2,440
    01-31-2006, 11:22 PM Go to last post
  10. Conditional Probability

    Hey I'm sorry this problem is kind of long, but I really cannot figure it out. The advantage of your experimental blood test is that 95% of the...

    Started by johndoe‎, 01-27-2006 06:13 PM
    • Replies: 2
    • Views: 3,711
    01-30-2006, 08:35 PM Go to last post
  11. Angry how do I do it?

    Statistics is not my strength so I hope you can explain this in really easy terms! I don't even understand what this question wants me to do, let...

    Started by karen c‎, 01-25-2006 11:35 AM
    • Replies: 3
    • Views: 6,696
    01-25-2006, 11:22 PM Go to last post
  12. Binomial probability

    Hi, I have the following problem. We are comparing two screening methods in one population. With method A we took 63 samples and 13 were...

    Started by Karr‎, 01-24-2006 11:01 AM
    • Replies: 2
    • Views: 3,070
    01-25-2006, 07:30 AM Go to last post
  13. Probabilty question

    Hi guys just wondering if what I'm doing is correct or not. Any help would be much appreciated. Heres the question: A die is weighted to that...

    Started by mariomaths‎, 01-23-2006 12:42 PM
    • Replies: 1
    • Views: 3,256
    01-23-2006, 01:03 PM Go to last post
  14. 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: 4,817
    01-23-2006, 05:49 AM Go to last post
  15. 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: 7,175
    01-23-2006, 05:41 AM Go to last post
  16. Independent study help..

    Greetings, I am new here and am in the middle of completing a research project for a Business Policy class. I put my Statistics independent class...

    Started by pwoodruffe‎, 01-19-2006 05:29 PM
    • Replies: 3
    • Views: 6,180
    01-20-2006, 11:38 AM Go to last post
  17. Unhappy Need Help Again!!!

    The manager of an Apple dealership keeps records on customers visiting the store. Records show that 40% of people visiting the store are female. ...

    Started by klewis‎, 01-11-2006 05:06 PM
    • Replies: 2
    • Views: 2,297
    01-13-2006, 12:43 PM Go to last post
  18. Question Lost and need Help

    I'm not sure which board this fits into so I posted in both, Sorry! I need assistance on the following problem (I'll state it and then state my...

    Started by missycl‎, 01-12-2006 07:07 PM
    • Replies: 1
    • Views: 3,158
    01-12-2006, 07:33 PM Go to last post
  19. Unhappy Probability Problem help

    Hey I need help with this problem...I really don't understand how to do Prob. Two number cubes were rolled 100 times. Based on the resul;ts below,...

    Started by whit_wha‎, 01-12-2006 04:53 PM
    • Replies: 1
    • Views: 3,097
    01-12-2006, 05:39 PM Go to last post
  20. Z tables

    Can someone tell me what Z upper and Z lower values are? I am trying to find theoretical parts out of spec. The specifications are -.30 to .30 with...

    Started by cholloway‎, 01-10-2006 10:22 PM
    • Replies: 5
    • Views: 6,710
    01-12-2006, 12:31 PM Go to last post
  21. survey question & conversion to variable

    I'm assuming this question will be an ordinal categorical variable. I added the "other" category since there are lots of methods used for dosing. If...

    Started by kalbright36‎, 01-09-2006 01:45 AM
    • Replies: 5
    • Views: 4,230
    01-10-2006, 11:30 PM Go to last post
  22. Probability question

    get confused :confused: 100 poker hands are dealt from separate well-shuffled decks.The random variable H is the number of hands with at least one...

    Started by rabbit‎, 01-08-2006 06:18 PM
    • Replies: 3
    • Views: 3,492
    01-09-2006, 10:49 PM Go to last post
  23. Help with Probability formual choosing

    Just need to know if answer/formual is correct. Aand B equally likely to occur. The Chance that either A or B happens on a given trial of an...

    Started by klewis‎, 01-08-2006 04:32 PM
    • Replies: 3
    • Views: 2,856
    01-09-2006, 10:31 AM Go to last post
  24. Probabilty problem for a Stock Market System

    Hi, I have a Probabilty problem for a Stock Market System. Assume I have backtested a system over say 1,000 historical trades. It wins say 40%...

    Started by pfpurcell‎, 01-05-2006 04:29 PM
    • Replies: 8
    • Views: 4,376
    01-09-2006, 09:59 AM Go to last post
  25. Unhappy Calculating z value/mean and standard deviation

    Hi...have completed my assignment (and have come a long way with some helpful tips on this forum) but am stuck on one problem: In grading apples...

    Started by ShannonL‎, 11-05-2005 11:25 PM
    • Replies: 11
    • Views: 42,660
    01-07-2006, 10:22 PM Go to last post
  26. 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: 3,191
    01-05-2006, 07:59 AM Go to last post
  27. Question finding non-randomness in binomial successes?

    Hi, I've only had one semester of Stats, so this is probably a real newbie question. I'm having problems on deciding how to approach a specific...

    Started by amarkb‎, 01-02-2006 03:10 PM
    • Replies: 7
    • Views: 3,299
    01-04-2006, 08:04 AM Go to last post
  28. Question Probability help

    In a poll of married couples, about 79 percent of the men and 55 percent of the women were employed outside the home. In 39 percent of the couples,...

    Started by summertigger‎, 12-18-2005 09:08 PM
    • Replies: 3
    • Views: 2,804
    12-23-2005, 04:42 PM Go to last post
  29. hi a problem of probability.

    There are 3 bag. there are 5 white and 5 black balls in 1st bag. In the 2nd 4 white and 8 black. in the 3rd8 white n 6 black. A ball is selected...

    Started by bundho‎, 12-22-2005 04:44 AM
    • Replies: 1
    • Views: 2,348
    12-22-2005, 09:35 AM Go to last post
  30. 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: 2,547
    12-21-2005, 10:37 PM Go to last post
  31. Continious random variable- Uniform.

    I'm having trouble with some questions. Problem 1. If we have a continious random variable X that is uniformly distributed on the interval...

    Started by Michelle‎, 12-18-2005 07:49 PM
    • Replies: 7
    • Views: 3,999
    12-18-2005, 09:14 PM Go to last post
  32. Probability

    The IRS says it will audit about 20 percent of all tax returns next year. What are the odds in favor of your being audited? I cant find the...

    Started by summertigger‎, 12-18-2005 08:34 PM
    • Replies: 1
    • Views: 2,946
    12-18-2005, 08:54 PM Go to last post
  33. Stats help Please!!!!

    This problem is driving me crazy! The length of time to complete a door assembly on an automobile factory assembly line is normally distributed...

    Started by becca3848‎, 12-16-2005 06:55 PM
    • Replies: 7
    • Views: 17,754
    12-18-2005, 01:56 PM Go to last post
  34. 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: 9,632
    12-15-2005, 11:13 AM Go to last post
  35. Question please help me out!

    I'm having problem with binomial and poisson distribution. please help me out.

    Started by bapex4real‎, 12-09-2005 09:21 AM
    • Replies: 1
    • Views: 2,462
    12-09-2005, 09:30 AM Go to last post
  36. Probability question (league related)

    I have a question that I figured I post to see some other people opinions. I'm part of a sport where there are multiple individual leagues of 12...

    Started by dak11‎, 12-08-2005 02:46 PM
    • Replies: 1
    • Views: 2,928
    12-08-2005, 03:26 PM Go to last post
  37. Help with normal distribution! (please!)

    Hi, I'm looking through some past papers for an exam I have this weekend and have come across this strange binomial distribution question, that's...

    Started by StevenX‎, 12-06-2005 11:27 AM
    • Replies: 4
    • Views: 3,620
    12-06-2005, 03:00 PM Go to last post
  38. Unhappy Help!

    I'm working on this problem and I am completely lost. There there anyone out there that can help me. I see the problem worked out in the book, but...

    Started by Stacy Jones‎, 12-02-2005 01:18 PM
    • Replies: 4
    • Views: 3,581
    12-02-2005, 03:49 PM Go to last post
  39. probability

    This is a part of a problem. I decided to ask it here after hours of trying to solve it... Two tennis players make a match composed of 5 sets....

    Started by demolay‎, 11-25-2005 12:34 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 7,533
    11-30-2005, 04:49 PM Go to last post
  40. Probability of intersection

    Hello, Does anyone know if the probability of intersection of A and B can be BIGGER than the multiplication of the probability of A with the...

    Started by Roni‎, 11-30-2005 04:29 AM
    • Replies: 1
    • Views: 6,135
    11-30-2005, 09:13 AM Go to last post
  41. Question Uniform Distribution/Probability Density Function

    I'm experiencing a mental block with this concept. If anyone could help me out, I'd be most appreciative. I understand the formula for the...

    Started by ambiguous325‎, 11-29-2005 02:00 PM
    • Replies: 3
    • Views: 9,927
    11-29-2005, 09:29 PM Go to last post
  42. Central Limit Theory?

    Hi everyone! Here's my problem: In a large population, 12.5% of all individuals have diabetes. (a) Seven of these individuals are sampled at...

    Started by abyss‎, 11-28-2005 07:44 PM
    • Replies: 7
    • Views: 3,891
    11-28-2005, 11:35 PM Go to last post
  43. Unhappy expectation of sums of random variables

    Hi I am having trouble solving a homework problem. It says: N people arrive separately to a profeesional dinner. Upon arrival each person looks...

    Started by wheatone‎, 11-22-2005 10:21 PM
    • Replies: 1
    • Views: 6,842
    11-23-2005, 11:59 AM Go to last post
  44. Unhappy problem with all laws...

    I have to pass a test on-line, but I really don't get it. I need to pass it at least 3 times without mistakes (knowing it does change every time i...

    Started by caora‎, 11-21-2005 02:07 PM
    • Replies: 3
    • Views: 4,748
    11-22-2005, 03:47 PM Go to last post
  45. need help with set-up

    Give the joint density f(x,y)= 60xy^2 if 0<x<y<1 and 0 otherwise, find P(X+Y<1). I just need help setting up the integral...I don't know what to...

    Started by megs915‎, 11-20-2005 01:44 PM
    • Replies: 1
    • Views: 4,375
    11-20-2005, 06:31 PM Go to last post
  46. Poisson distribution

    The Poisson Distribution is often used as a model for the number of events occuring within a specific time period. The Poisson probability mass...

    Started by quark‎, 11-17-2005 12:25 PM
    • Replies: 0
    • Views: 23,428
    11-17-2005, 12:25 PM Go to last post
  47. Need lots of help - Binomial Probabilities

    I completely confused on this my problem is this: Richard has just been given a 10 question multiple-choice quiz in his history class. Each...

    Started by CheriHagans‎, 11-16-2005 10:18 PM
    • Replies: 2
    • Views: 13,294
    11-16-2005, 10:29 PM Go to last post
  48. Question Probability

    Ok I am very new to stats and am very confused. I went to the examples board and now am even more confused. Here is the problem. Ok they offer a...

    Started by jaben‎, 11-15-2005 11:35 AM
    • Replies: 13
    • Views: 5,897
    11-15-2005, 03:11 PM Go to last post
  49. Please Help-binomial probability distribution, etc

    Wish I'd found your site a long time ago! I have been working on this all day long with no success and I don't know what to do. I am to...

    Started by SusanZ‎, 11-13-2005 07:31 PM
    • Replies: 2
    • Views: 5,273
    11-15-2005, 12:10 PM Go to last post
  50. probability

    ok and also to my last question: The 1 in 1000. So would I take 1/1000=.001 then take .001 * 52 (because people make an avg of 52 purchase/yr.)...

    Started by jaben‎, 11-15-2005 11:48 AM
    • Replies: 2
    • Views: 3,089
    11-15-2005, 12:08 PM Go to last post
  51. Need help please.

    A recent study indicaed that 82% of US households speak English at home. If 4 households are randomlu selected then.... a. What is the...

    Started by lost822‎, 11-14-2005 06:51 PM
    • Replies: 2
    • Views: 3,009
    11-14-2005, 08:32 PM Go to last post
  52. Question statistics help

    Hey this is my first time doing this but I am makeing a b in the elementary statistics class that I am in I need help finding out how to find the...

    Started by amiller2‎, 11-07-2005 06:52 PM
    • Replies: 5
    • Views: 3,135
    11-14-2005, 08:24 PM Go to last post
  53. Exclamation Please Help! I am really stuck on some problems....

    During the past forty years, the monthly rate of return of stocks has been approximately normally distrubuted, with u=0.75 percent and sigma=4.2...

    Started by Fashion7‎, 11-11-2005 10:47 PM
    • Replies: 10
    • Views: 4,551
    11-14-2005, 11:34 AM Go to last post
  54. Explain Terms...

    Am I correct? Q: A study compares two groups of mothers with young children who were on welfare two years ago. One group attended a voluntary...

    Started by mackerbuddy‎, 11-14-2005 04:37 AM
    • Replies: 1
    • Views: 8,797
    11-14-2005, 09:51 AM Go to last post
  55. The Probability of a Flush

    Hiya :) Im back for some more assistance.... Q: THE PROBABILITY OF A FLUSH A poker player holds a flush when all 5 cards in the hand belong to...

    Started by mackerbuddy‎, 11-14-2005 03:10 AM
    • Replies: 1
    • Views: 29,374
    11-14-2005, 09:45 AM Go to last post
  56. Confidence Interval and SRS

    Another quick question.... Q: Running Red Lights A survey of licensed drivers inquired about running red lights. One question asked "Of...

    Started by mackerbuddy‎, 11-14-2005 04:29 AM
    • Replies: 1
    • Views: 16,231
    11-14-2005, 09:27 AM Go to last post
  57. Significance Test: Ho & Ha

    Me again :) This is a long assingment I'm working on, and I have another question that I'm doubting my answer on.... This is the question: Q: ...

    Started by mackerbuddy‎, 11-13-2005 06:46 AM
    • Replies: 1
    • Views: 79,516
    11-13-2005, 09:40 AM Go to last post
  58. Margin of Error/Sample Size...

    I have another questions that I am not totally sure of the answer.... It has to do with the size of a sample. This is the question... Q: A...

    Started by mackerbuddy‎, 11-12-2005 08:34 AM
    • Replies: 1
    • Views: 8,022
    11-12-2005, 09:09 AM Go to last post
  59. Hi I need help w/ sampling distribution.

    HI, I'm taking statistics and i was trying to solve a problem, but I couldn't solve it. I was wondering if you could help me out. Here's the...

    Started by Michelle‎, 11-11-2005 05:19 PM
    • Replies: 4
    • Views: 4,604
    11-11-2005, 07:49 PM Go to last post
  60. in the movies

    can someone help me!!!!! i've been stuck in this problem for hours now!!! ack!!!! heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp meeeeeeeeeeeeeeeeeeeeeeee...

    Started by HemlyFan‎, 11-09-2005 07:05 PM
    • Replies: 4
    • Views: 3,806
    11-11-2005, 04:53 PM Go to last post

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