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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: 31,144
    09-30-2005, 09:44 AM Go to last post
  1. General Comments Regarding Odds

    "To get the probability of winning the jackpot, multiply .00000034847 by the probability of matching the power ball, to get .0000000082969 or odds of...

    Started by quark‎, 08-29-2005 10:18 PM
    • Replies: 0
    • Views: 3,248
    08-29-2005, 10:18 PM Go to last post
  2. Probability?

    Find the total number of outcomes when choosing the last three digits in a five-digit zip code if the first digit is 6 and the second digit is 1,...

    Started by mattc‎, 08-29-2005 09:46 PM
    • Replies: 1
    • Views: 4,189
    08-31-2005, 10:40 PM Go to last post
  3. Wink Probability

    Question: Melissa must finish two courses, statistics and economics, in order to complete requirements for a degree. All along she has mainttaned an...

    Started by edwim12‎, 09-06-2005 08:32 PM
    • Replies: 2
    • Views: 4,257
    09-07-2005, 01:21 PM Go to last post
  4. Smile Probability

    Question 1. A major shoe store is selling brands A,B and C. Probabilities that Brand A,Brand B, or Brand C will not be big sellers are:...

    Started by edwim12‎, 09-07-2005 01:54 PM
    • Replies: 2
    • Views: 3,924
    09-08-2005, 06:18 PM Go to last post
  5. Lightbulb probability help

    I'm not looking for simply the answer but i need to know the step by step solution process, and what formula you used if any to solve for it please....

    Started by ecohelp‎, 09-17-2005 09:32 PM
    • Replies: 7
    • Views: 5,327
    09-18-2005, 11:18 AM Go to last post
  6. Question probability

    regarding poisson, how would you go about solving if a question reads: A hospital has noted that they admit an average of 8 patients per hour. ...

    Started by ecohelp‎, 09-18-2005 10:35 AM
    • Replies: 2
    • Views: 6,020
    09-18-2005, 11:57 AM Go to last post
  7. Question Probability

    You have been put in charge of developing a new game of chance. In this game a person will roll two cubes each having the numbers 1 to 6 on their...

    Started by pla0812‎, 09-19-2005 10:51 AM
    • Replies: 1
    • Views: 3,365
    09-21-2005, 12:59 PM Go to last post
  8. Help with Confidence Intervals

    The questions regarding confidence intervals and population means are hard to understand: Please help me set them up in a formula and solve. #3 ...

    Started by Rugrats3‎, 09-25-2005 04:12 PM
    • Replies: 4
    • Views: 6,695
    09-26-2005, 10:01 AM Go to last post
  9. Help me please

    Hi all, please i have only one question and I can finish my qestions exam which isdue to morrow,Please , I beg you to help me. Q: The P - value in...

    Started by keith‎, 09-29-2005 01:58 PM
    • Replies: 1
    • Views: 7,689
    09-29-2005, 07:20 PM Go to last post
  10. Buffon's Needle Experiment

    This problem is quite interesting: A fine needle of length l is dropped at random on a board covered with parallel lines distance d apart where...

    Started by quark‎, 10-04-2005 02:08 PM
    • Replies: 0
    • Views: 8,960
    10-04-2005, 02:08 PM Go to last post
  11. Exclamation Please help! ***

    I'm having a difficult time figuring this out... confused on how to go about solving, & which formula/steps to use.... A population has a mean...

    Started by ecohelp‎, 10-05-2005 11:43 PM
    • Replies: 1
    • Views: 7,543
    10-06-2005, 08:03 AM Go to last post
  12. Urgent Help Please

    :( I have this statistics problem that i must solve as soon as possible. You have 5 oil paints and 6 water paints. The director of the museum...

    Started by tik‎, 10-06-2005 01:52 AM
    • Replies: 3
    • Views: 4,788
    10-06-2005, 08:46 AM Go to last post
  13. Talking too many gumballs

    i am pulling my hair out over this chapter on probability. First question which formula do I use to determine this answer. A gumball machine...

    Started by hilarysears77‎, 10-07-2005 01:52 PM
    • Replies: 1
    • Views: 18,028
    10-07-2005, 02:25 PM Go to last post
  14. fizz fizz away

    okay one more for you that i think I know the answer. i apologize if these must seem easy and I may seem :confused: but hey i am not the brightest...

    Started by hilarysears77‎, 10-07-2005 08:13 PM
    • Replies: 1
    • Views: 4,661
    10-07-2005, 08:57 PM Go to last post
  15. Exclamation True or False Probability ?

    A used car lot has 15 cars. Five of these cars were manufactured in the US and the remainder were made in other countries. If two cars are...

    Started by jessi‎, 10-09-2005 04:13 PM
    • Replies: 1
    • Views: 5,380
    10-09-2005, 04:23 PM Go to last post
  16. Performing a blood analysis

    To perform a certain type of blood analysis the lab tech must perform two procedures. First procedures requires either 1 or 2 steps and the secound...

    Started by NikNice‎, 10-09-2005 04:32 PM
    • Replies: 1
    • Views: 11,761
    10-09-2005, 04:41 PM Go to last post
  17. Probability of a patients trust

    Here is my problem. A psychologist determined that the number of hours required to obtain the trust of a patient is 1,2, or 3. Let x be a random...

    Started by NikNice‎, 10-09-2005 04:58 PM
    • Replies: 2
    • Views: 3,794
    10-09-2005, 05:34 PM Go to last post
  18. Exclamation True or False Probability please help!!

    When a customer comes to a bank, there are three primary locations they may select to go to:teller, loan officer, or escrow department. Based on...

    Started by jessi‎, 10-09-2005 05:32 PM
    • Replies: 1
    • Views: 6,418
    10-09-2005, 05:43 PM Go to last post
  19. Exclamation I need help please!!!

    A mail order company receives an average of five orders per 500 solicitations. If it sends out 100 advertisements, find the probability of receiving...

    Started by carebear70417‎, 10-09-2005 08:33 PM
    • Replies: 4
    • Views: 10,415
    10-09-2005, 08:51 PM Go to last post
  20. Births

    Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of an other...

    Started by carebear70417‎, 10-09-2005 09:08 PM
    • Replies: 1
    • Views: 16,472
    10-09-2005, 09:22 PM Go to last post
  21. Talking i hope i make JohnM and quark proud

    :eek: okay i managed to do a bonus question on my "take home test" (which is kinda :) . I just want to see if I did it right and answered it...

    Started by hilarysears77‎, 10-10-2005 05:37 PM
    • Replies: 5
    • Views: 4,846
    10-10-2005, 08:33 PM Go to last post
  22. Help needed

    Hi, not sure how to resolve the following: An airplane as a capacity of 23 passengers. The airline knowning that 10% of passengers who have...

    Started by qbjc4300‎, 10-11-2005 05:50 AM
    • Replies: 2
    • Views: 4,606
    10-11-2005, 12:20 PM Go to last post
  23. multiple choice

    please help! if given multiple choice test with 10 questions and each having 5 choices, what is the prob of getting atleast one correct? also of...

    Started by jt72‎, 10-11-2005 08:43 PM
    • Replies: 1
    • Views: 5,760
    10-11-2005, 08:56 PM Go to last post
  24. Question please help...i'm stuck

    Question: There are 8,000 teachers at UCLA. The average age of all the teachers is 24 years with a standard deviation of 9 years. A random sample...

    Started by ecohelp‎, 10-14-2005 02:24 PM
    • Replies: 5
    • Views: 5,797
    10-14-2005, 08:55 PM Go to last post
  25. Probability

    I have two probablity problems I'm stuck on. Just show me how to set up and work the problems and i can go from there> 1. I am a intake nurse...

    Started by slisaje‎, 10-15-2005 12:48 AM
    • Replies: 1
    • Views: 3,702
    10-15-2005, 10:08 AM Go to last post
  26. Question probability of a flush?

    hey guys, so I worked out this problem but i'm just wondering if I am right and maybe how much further in depth I may need to go Question: suppose...

    Started by wynd90‎, 10-15-2005 04:20 PM
    • Replies: 1
    • Views: 3,221
    10-15-2005, 05:15 PM Go to last post
  27. Question high-low stud

    hey, i got this question given to me in stats and it's just not making any sense in my head. in high-low stud a hand counts as low if it consists...

    Started by wynd90‎, 10-14-2005 12:07 PM
    • Replies: 5
    • Views: 3,551
    10-15-2005, 07:07 PM Go to last post
  28. Poll Poll: Let's Make a Deal....

    Monty Hall presents you with 3 doors. Behind one of the doors is a new car. Behind the other 2 doors, there's nothing. You make your choice of...

    Started by JohnM‎, 10-05-2005 02:51 PM
    • Replies: 2
    • Views: 4,877
    10-17-2005, 10:14 AM Go to last post
  29. probability--standard deviation question??

    A machine has been programmed to bore holes with a mean diameter = 0.15 mm and with a standard deviation = 0.005 mm. Parts will be rejected if the...

    Started by lmw‎, 10-18-2005 03:32 PM
    • Replies: 3
    • Views: 5,463
    10-18-2005, 07:39 PM Go to last post
  30. Help!! Probability ?????????????

    I have a problem and need some step to step computation and a bit of explanantion. Have deadine of tomorrow Here's the problem: Oil company...

    Started by Elizer‎, 10-19-2005 08:52 AM
    • Replies: 9
    • Views: 9,213
    10-20-2005, 10:24 AM Go to last post
  31. Unhappy more uniform dist.

    If a is uniformly distributed over (-21,25), what is the probability that the roots of the equation x+ax+a+80=0 are both real? I have no idea what...

    Started by megs915‎, 10-23-2005 06:53 PM
    • Replies: 1
    • Views: 4,232
    10-23-2005, 06:57 PM Go to last post
  32. Unhappy uniform distribution

    A manager of a store reports that the time of a customer on the second floor must wait for the elevator has a uniform distribution ranging from 2 to...

    Started by megs915‎, 10-23-2005 06:43 PM
    • Replies: 5
    • Views: 8,861
    10-24-2005, 12:04 PM Go to last post
  33. deciles

    Women's weights are normally distributed with a mean of 143 lb and a standard deviation of 29lb. Find the third decile, D3, which separates the...

    Started by megs915‎, 10-24-2005 12:06 PM
    • Replies: 1
    • Views: 4,915
    10-24-2005, 12:20 PM Go to last post
  34. Not understanding Normal Distribution

    I am having trouble wrapping my head around normal distributions and the revelance it has with statistics.--- Can someone help me to understand in...

    Started by jennifer E‎, 10-24-2005 11:58 AM
    • Replies: 3
    • Views: 8,232
    10-24-2005, 03:43 PM Go to last post
  35. Probability

    Hello to everyone... I'm very new to stats and have worked through my assignments but am not sure I'm on the right track. The question is: Two...

    Started by ShannonL‎, 10-24-2005 09:44 PM
    • Replies: 5
    • Views: 4,613
    10-24-2005, 10:36 PM Go to last post
  36. candy

    A candy store owner has daily demand Y for a certain brand of candy sold from the bulk bins. Suppose the owner will never stock more than one...

    Started by megs915‎, 10-24-2005 12:05 PM
    • Replies: 5
    • Views: 4,864
    10-25-2005, 04:51 PM Go to last post
  37. Conditional Probability

    To reduce theft, the ABCD Company screens all its employees with a lie detector test that is known to be correct 90 percent of the time (for both...

    Started by quark‎, 10-30-2005 11:59 PM
    • Replies: 0
    • Views: 7,662
    10-30-2005, 11:59 PM Go to last post
  38. Poisson Distribution Question

    I am using the Poisson distribution model the determine the probability of an event occurring. I know that the mean of the event occurring is 7. ...

    Started by Relentless‎, 10-31-2005 11:11 PM
    • Replies: 10
    • Views: 7,718
    11-01-2005, 12:17 PM Go to last post
  39. Binomial Probabilities

    These kinds of questions can be answered using the binomial probability distribution: 1. If I flip a coin 20 times, what is the probability of...

    Started by JohnM‎, 11-01-2005 02:50 PM
    • Replies: 0
    • Views: 50,499
    11-01-2005, 02:50 PM Go to last post
  40. simple enough?

    Hi Folks..just started stats 102. I'm getting a little stuck with the concept of sample space and events. Although I understand both ideas as I'm...

    Started by greenatstats‎, 11-02-2005 01:08 AM
    • Replies: 2
    • Views: 4,118
    11-02-2005, 10:21 AM Go to last post
  41. Standard Deviation problem...

    At a motor repair shop, a mechanic can tune-up a car in an average of 30 minutes with a standard deviation of 5 minutes. Assume that the time it...

    Started by Taka‎, 11-02-2005 07:26 AM
    • Replies: 5
    • Views: 5,106
    11-02-2005, 03:01 PM Go to last post
  42. can you help with this as well!?

    Suppose that 20% of all subscribers to a business magazine earn an income greater than $100,000. If the magazine takes a random sample of 20...

    Started by statsdud‎, 11-02-2005 05:01 PM
    • Replies: 4
    • Views: 3,487
    11-03-2005, 03:15 PM Go to last post
  43. Smile help!?!

    Suppose you are the admissions officer at a university. Your university has room for a first year class of 5,000. When you admit students, you know...

    Started by statsdud‎, 11-02-2005 03:05 PM
    • Replies: 6
    • Views: 3,193
    11-04-2005, 12:05 AM Go to last post
  44. quest.

    Hi! Not looking for answers, just direction -- don't know what type of probability model to use to se up Q: Quality control inspector for company...

    Started by chrisn‎, 11-01-2005 05:29 PM
    • Replies: 2
    • Views: 3,337
    11-04-2005, 01:49 AM Go to last post
  45. Need help

    Please help me to find how to prove: Cov(aX+b,cY+d)=Cov(X,Y) Thank you in advance mail me rustamna@yahoo.com

    Started by rust‎, 11-05-2005 06:02 AM
    • Replies: 5
    • Views: 3,846
    11-05-2005, 10:13 PM Go to last post
  46. two way tables

    Maybe there is no way to do this on this format. However, I am a bit stuck on a question about showing proportions on a two way table....probably...

    Started by greenatstats‎, 11-04-2005 01:11 AM
    • Replies: 7
    • Views: 4,498
    11-06-2005, 04:51 PM Go to last post
  47. Question I had 100 question and I am stuck with the following 7 questions! Help

    Suppose the fill amount of bottles of soft drink has been found to be normally distributed with a mean of 2.0 liters and a standard deviation of...

    Started by gdefne‎, 11-07-2005 02:15 PM
    • Replies: 1
    • Views: 7,881
    11-07-2005, 02:46 PM Go to last post
  48. Post Symbols in statistics

    x^n x to the power of n, x^2 is x squared nPr Permutation, nPr = n!/(n-r)! nCr Combination, nCr = n!/(r!(n-r)!) P(A|B)

    Started by quark‎, 11-07-2005 04:11 PM
    • Replies: 0
    • Views: 11,169
    11-07-2005, 04:11 PM Go to last post
  49. stuck on probability

    I'm just about done my 2nd assignment and find when I stay at it too long I start to space-out on some of even the more seemingly easier items. I...

    Started by greenatstats‎, 11-06-2005 10:13 PM
    • Replies: 10
    • Views: 4,964
    11-07-2005, 05:48 PM Go to last post
  50. Question Probability distribution of x

    Hi there... The question is: One of Canada's well-known distance learning institutions published the age profile of its first-time students. A...

    Started by ShannonL‎, 11-08-2005 10:19 PM
    • Replies: 2
    • Views: 3,328
    11-08-2005, 10:48 PM Go to last post
  51. Conditional Probability...

    Hello, I'm working on a problem, and I think I'm doing it correctly, but it doesn't really match what I wrote down in class - so I think maybe I...

    Started by mackerbuddy‎, 11-11-2005 04:49 AM
    • Replies: 1
    • Views: 7,375
    11-11-2005, 12:50 PM Go to last post
  52. 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: 4,062
    11-11-2005, 04:53 PM Go to last post
  53. 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: 4,986
    11-11-2005, 07:49 PM Go to last post
  54. 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: 8,455
    11-12-2005, 09:09 AM Go to last post
  55. 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: 81,197
    11-13-2005, 09:40 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: 17,105
    11-14-2005, 09:27 AM Go to last post
  57. 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: 30,317
    11-14-2005, 09:45 AM Go to last post
  58. 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: 9,164
    11-14-2005, 09:51 AM Go to last post
  59. 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: 4,871
    11-14-2005, 11:34 AM Go to last post
  60. 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: 3,310
    11-14-2005, 08:24 PM Go to last post

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