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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: 30,232
    09-30-2005, 09:44 AM Go to last post
  1. Please help me.I need your support

    Eight tyres of different brands are ranked from 1 to 8 (best to worst) according to mileage performance. If four of these tyres are selected at...

    Started by mika‎, 03-14-2006 11:07 PM
    • Replies: 2
    • Views: 8,483
    03-20-2006, 10:42 AM Go to last post
  2. creating sten scores

    Hi, Please can someone help me out with creating a sten score - I am unsure of the process to follow to do this - is it something that can be...

    Started by AnnaHoy‎, 03-20-2006 12:01 AM
    • Replies: 0
    • Views: 5,997
    03-20-2006, 12:01 AM Go to last post
  3. Having a little trouble with this question:

    A 28 yr. old man pays $158 for a one year life insurance policy with coverage of $110,000. If the probability he will live through the year is...

    Started by mayday‎, 03-19-2006 07:56 PM
    • Replies: 1
    • Views: 2,812
    03-19-2006, 10:22 PM Go to last post
  4. Question In a certain town....

    40% of voters favor a given ballot measure. For groups of 22 voters, find the mean and standard deviation for the number who favor the measure.

    Started by mayday‎, 03-19-2006 10:21 PM
    • Replies: 0
    • Views: 4,312
    03-19-2006, 10:21 PM Go to last post
  5. Probability question

    Hi, I guess it will be an easy question for you. I am just getting started with probability and have not understand it good. I have some basic...

    Started by vlash‎, 03-16-2006 03:51 PM
    • Replies: 1
    • Views: 2,505
    03-16-2006, 09:26 PM Go to last post
  6. Please help me.I need your support

    There are two diagnostic tests for a disease. Among those who have the disease, 10% give negative results for the first test and, independently of...

    Started by mika‎, 03-14-2006 11:05 PM
    • Replies: 1
    • Views: 2,526
    03-16-2006, 10:46 AM Go to last post
  7. Please Help

    I am stuck on the following question for my coursework. A factory produces metal rods. One project requires that the rods are 60 + or - 0.2 cm...

    Started by LindaM‎, 03-12-2006 07:04 PM
    • Replies: 4
    • Views: 2,138
    03-12-2006, 07:33 PM Go to last post
  8. Event Certainty

    Please help. Can it be concluded that if there is a 50% chance of contracting a communicable disease through contact with an infected person, there...

    Started by shangwuvn‎, 03-12-2006 03:23 AM
    • Replies: 1
    • Views: 3,677
    03-12-2006, 01:23 PM Go to last post
  9. 3 Coin Bet

    Please help me with this problem A man has 3 coins as followings: Coin 1: Head Head Coin 2: Tail Tail Coin 3: Head Tail He selects one...

    Started by shangwuvn‎, 03-11-2006 07:11 PM
    • Replies: 3
    • Views: 3,665
    03-11-2006, 09:56 PM Go to last post
  10. Rolls of die

    Please help me with this problem: A man won in a bet that in 4 rolls of a die, he could get at least one 6. However, he lost in a bet that in 24...

    Started by shangwuvn‎, 03-11-2006 08:40 PM
    • Replies: 1
    • Views: 3,548
    03-11-2006, 09:52 PM Go to last post
  11. I am having trouble with normal approximation to the binomial.

    Approx 57% of people taking the bar exam pass. If 500 people take the exam, find the probablity that 300 or less pass the exam. n= 500 p= .57 q =...

    Started by Linda‎, 03-08-2006 09:51 PM
    • Replies: 2
    • Views: 3,120
    03-09-2006, 10:13 AM Go to last post
  12. Proof

    Hi everybody! We would like to proof the following statement: given a random variable X with probability density function f(x) having support in...

    Started by jdelser‎, 03-09-2006 09:52 AM
    • Replies: 0
    • Views: 2,477
    03-09-2006, 09:52 AM Go to last post
  13. Question elementary terminology question

    I work with elementary students and want to make sure I am using precise terminology with them. I've searched the web, math dictionaries, books etc....

    Started by kathy678‎, 03-08-2006 09:40 PM
    • Replies: 3
    • Views: 3,191
    03-08-2006, 10:17 PM Go to last post
  14. random sample probability question

    A company produces cola. The amount of cola in a can is a random variable that is normally distributed with a variance of 0.81 ml. A random sample of...

    Started by anthonys‎, 03-08-2006 12:58 AM
    • Replies: 2
    • Views: 3,249
    03-08-2006, 02:11 PM Go to last post
  15. Easy question for you people

    Hi all, A gambling question What procedure/formula would I use to work out the following. If I have a win strike rate of 20% how do I work...

    Started by martyncarr‎, 03-07-2006 12:07 PM
    • Replies: 2
    • Views: 2,415
    03-07-2006, 12:31 PM Go to last post
  16. Question Negative Binomial Distribution HELP PLEASE!

    Hi. My statistics professor assigned an extra credit problem that is due on March 6th and I was wondering if anyone can help me solve it. The...

    Started by frankusho‎, 03-03-2006 05:25 PM
    • Replies: 2
    • Views: 3,874
    03-06-2006, 06:28 AM Go to last post
  17. need assistance

    I am taking a course in safety and now have one class left, but ran into a big problem. This class has statistics and I don't have a clue. The text...

    Started by double‎, 03-01-2006 11:35 AM
    • Replies: 5
    • Views: 36,036
    03-05-2006, 06:23 PM Go to last post
  18. Distribution probability

    Hi, I'm new here but this question really has me stumped... A distribution of scores has a standard deviation of 4.9326 and a population mean of...

    Started by SkinnerStats‎, 03-01-2006 07:30 PM
    • Replies: 3
    • Views: 2,964
    03-03-2006, 11:06 PM Go to last post
  19. Challenging Probability Question

    An analyst is presented with lists of four stocks and five bonds. He is asked to predict, in order, the two stocks that will yield the highest return...

    Started by anthonys‎, 03-02-2006 05:15 PM
    • Replies: 2
    • Views: 4,079
    03-03-2006, 01:37 AM Go to last post
  20. Moved: Help, and I have no statistical background.

    I am taking a course in safety and now have one class left, but ran into a big problem. This class has statistics and I don't have a clue. The text...

    Started by double‎, 12-25-2006 09:46 PM
    • Replies: -
    • Views: -
    03-01-2006, 01:08 PM Go to last post
  21. factorial.. with replacement?

    Here is the problem.. (literally..) In your stats class, the teacher has three drawing for prizes (a, b , c). There are 15 students in class ...

    Started by masspt‎, 02-28-2006 11:07 PM
    • Replies: 2
    • Views: 6,640
    03-01-2006, 07:35 AM Go to last post
  22. random variable x

    Consider a continuous random variable X with the density function (called the exponential density) f(x) =8<: e^-x if x = 0; and 0 otherwise: a)...

    Started by AkinIE‎, 02-28-2006 12:11 PM
    • Replies: 1
    • Views: 3,039
    02-28-2006, 11:48 PM Go to last post
  23. help please

    You are doing an industry analysis of the Bloomington pizza industry. The rate (per year) at which pizza restaurants enter the industry is given by...

    Started by AkinIE‎, 02-28-2006 12:09 PM
    • Replies: 0
    • Views: 3,729
    02-28-2006, 12:09 PM Go to last post
  24. Probabilities for a card game

    the other day my son and i invented a card game where you are dealt three cards and then do a typical draw discard turn in trying to get a total of...

    Started by jerryb‎, 02-27-2006 10:57 AM
    • Replies: 2
    • Views: 3,968
    02-27-2006, 02:10 PM Go to last post
  25. This is not homework. Just for entertainment.

    My gaming clan was having a dispute over some voting procedures and I posed a question for them to answer. If they get it right I would donate an...

    Started by Toaster Oven‎, 02-24-2006 01:12 PM
    • Replies: 4
    • Views: 3,044
    02-27-2006, 07:57 AM Go to last post
  26. Stuck on this...

    I'm kind of stuck on my homework. I was given a chart of a total of 1052 people (men 495, women 557) in four categories: nonsmokers (men 335,...

    Started by mayday‎, 02-26-2006 09:27 PM
    • Replies: 1
    • Views: 3,276
    02-26-2006, 10:39 PM Go to last post
  27. Question I need help with these problems,

    Hey everyone, I am new at this forum. I need help with these problem... I hope you can provide me with full solution and steps please...

    Started by AkinIE‎, 02-26-2006 10:24 PM
    • Replies: 1
    • Views: 6,085
    02-26-2006, 10:34 PM Go to last post
  28. Expected value

    Hi, have a question about expected value, there is only a few lines my text book regarding this. The prizes that can be won in a sweepstakes are...

    Started by tejay‎, 02-25-2006 10:13 PM
    • Replies: 2
    • Views: 6,316
    02-25-2006, 10:50 PM Go to last post
  29. Probability Questions

    1) Out of 2 million hay fever sufferers in Canada, 78% are allergic to ragweed. If a random sample of 7 hay fever sufferers is selected, a)...

    Started by sharon‎, 02-25-2006 05:17 PM
    • Replies: 1
    • Views: 3,865
    02-25-2006, 05:23 PM Go to last post
  30. Candy Slection

    There are five candy bars in a box and one of them is a snickers bar. If two children pick out two candies each what is the chace that I will get the...

    Started by soyun‎, 02-23-2006 07:31 PM
    • Replies: 7
    • Views: 2,794
    02-23-2006, 11:27 PM Go to last post
  31. Poisson question

    Can anyone help woth this? Mineral desposits in a certain area occur in a spatial Poisson process of rate 1per 100km2. A mining company buys...

    Started by mariomaths‎, 02-23-2006 04:13 PM
    • Replies: 3
    • Views: 2,967
    02-23-2006, 04:44 PM Go to last post
  32. Post What do you think ?

    I am new to stats so I need help They have also asked the probability of an individual consumer receiving a prize over the course of a year. For...

    Started by mcafeep‎, 02-23-2006 10:51 AM
    • Replies: 2
    • Views: 2,129
    02-23-2006, 01:07 PM Go to last post
  33. A Few More Questions...

    My study group and I are struggling.... 1) A certain lottery has 49 numbers, 6 of which are the winning numbers for a particular game. To play...

    Started by mlampingbhhs‎, 02-21-2006 01:21 PM
    • Replies: 2
    • Views: 2,361
    02-21-2006, 02:06 PM Go to last post
  34. Question Full House

    "In poker, a full house is a 5-card hand with 3 cards of one rank and 2 cards of another rank. Suppose you are dealt 5 cards from a standard 52-card...

    Started by mlampingbhhs‎, 02-21-2006 01:09 PM
    • Replies: 2
    • Views: 2,925
    02-21-2006, 01:28 PM Go to last post
  35. Hypergeometric Probabilities

    These are similar in principle to the binomial distribution, with one major exception - the hypergeometric probability is for situations where you...

    Started by JohnM‎, 02-20-2006 11:59 AM
    • Replies: 0
    • Views: 12,545
    02-20-2006, 11:59 AM Go to last post
  36. KENO probability

    "In the game of Keno, 80 numbers are displayed on a reader board. 20 of these numbers are chosen to be the winning numbers. Suppose a person has...

    Started by mlampingbhhs‎, 02-17-2006 01:49 PM
    • Replies: 3
    • Views: 5,390
    02-20-2006, 10:48 AM Go to last post
  37. please help a stupid engineer

    Hi guys, I have a problem which should be pretty basic, but I cannot remember how to do it. There is a probability p that one water customer...

    Started by beezaur‎, 02-17-2006 10:20 PM
    • Replies: 9
    • Views: 3,246
    02-18-2006, 02:30 PM Go to last post
  38. help with questions

    1. probability that 4 randomly selected people all have different birthdays? answeres: 0.9891 or 0.9836 show me how to get answere please 2....

    Started by hannao1‎, 02-17-2006 06:05 PM
    • Replies: 2
    • Views: 2,980
    02-18-2006, 12:12 AM Go to last post
  39. Difficulty correlating terminology with symbols.

    The book we are using for this class uses words instead of the symbols in some of the homework problems we are using. My question is: Is P(A...

    Started by Toaster Oven‎, 02-17-2006 12:00 PM
    • Replies: 2
    • Views: 5,140
    02-17-2006, 12:11 PM Go to last post
  40. Fitting words into probability rules

    I am confused as to what rules to apply when i encounter conditional probability word problems, especially problems involving decks of cards. ...

    Started by jandrade‎, 02-15-2006 01:18 AM
    • Replies: 3
    • Views: 3,907
    02-16-2006, 11:01 AM Go to last post
  41. Unhappy still having difficulty after reading previous threads

    Regarding Question #2 In grading apples into "A","B" and "C" a large orchard uses weights to distinguish apples. Any apple weighing more than...

    Started by klewis‎, 02-14-2006 03:01 PM
    • Replies: 4
    • Views: 3,457
    02-15-2006, 02:29 PM Go to last post
  42. Unhappy having difficulty with question similiar to previous post

    Still having difficulty solving for u and s Question is It is known that the IQ scores of workers in a certain company are normally...

    Started by klewis‎, 02-14-2006 03:12 PM
    • Replies: 2
    • Views: 3,570
    02-15-2006, 12:32 PM Go to last post
  43. Question Bidding question - (Uniform Probability Distribution)

    Suppose you are interested in bidding on a piece of land and we know one other bidder is interested. The seller announced that the highest bid in...

    Started by Parillamaster‎, 02-14-2006 10:40 AM
    • Replies: 4
    • Views: 18,983
    02-14-2006, 12:26 PM Go to last post
  44. Thank You All!!

    The probability of me passing a test with out your willingness to help me understand statistics and probabilites is the following: P(A U B U C U...

    Started by Parillamaster‎, 02-14-2006 09:23 AM
    • Replies: 1
    • Views: 2,628
    02-14-2006, 11:16 AM Go to last post
  45. Black Jack Anyone?

    Using the hypergeometric probability function below: P(x) = (r/x)((N-r)/(n-x))/(N/n) P(x) = probability of x success in n trials n = number of...

    Started by Parillamaster‎, 02-13-2006 11:29 AM
    • Replies: 3
    • Views: 5,892
    02-13-2006, 03:02 PM Go to last post
  46. Question Discrete Probability Distributions - Shoot me now!

    I spent three hours at a basketball tournament trying to figure these out. Please help. Using the Poisson Probability Distribution I have the...

    Started by Parillamaster‎, 02-13-2006 09:08 AM
    • Replies: 2
    • Views: 26,494
    02-13-2006, 09:58 AM Go to last post
  47. stressed out in Binomial distributions

    Two Question first one I have answered just checking to see if process is correct...........Second question I just cant get my head around First...

    Started by klewis‎, 02-10-2006 04:43 PM
    • Replies: 1
    • Views: 3,329
    02-10-2006, 08:45 PM Go to last post
  48. Probabilty question

    Hi guys, I was stuck on these particular questions and have tried to include a bit of what I thought would lead me to the answer. Can anyone help...

    Started by mariomaths‎, 02-08-2006 01:19 PM
    • Replies: 1
    • Views: 3,280
    02-09-2006, 11:42 AM Go to last post
  49. How do I finish out this problem?

    Question: John is traveling to Las Vegas to bet his entire life savings, $20,000, on one roll of the (two) dice. If the total is 7 or 11 he will...

    Started by orangeb‎, 02-08-2006 07:35 AM
    • Replies: 1
    • Views: 2,775
    02-08-2006, 01:31 PM Go to last post
  50. More questions from the Math Challenged

    Here are more questions that I am lost on if anyone cares to tackle. If possible I would like to know the steps to the answer also, not just the...

    Started by orangeb‎, 02-08-2006 07:48 AM
    • Replies: 1
    • Views: 3,006
    02-08-2006, 01:30 PM Go to last post
  51. Am I on the right track for this one?

    The height of people in a certain population is approx. normally distributed with a mean of 67 inches and a standard deviation of 3.4 inches....

    Started by karen c‎, 02-07-2006 11:56 PM
    • Replies: 4
    • Views: 2,720
    02-08-2006, 12:59 AM Go to last post
  52. Is my thinking correct?

    I actually figured this one out ( it took 15 minutes, which is good for me) but need to clarify the answer as the text does not provide it! The...

    Started by karen c‎, 02-07-2006 11:35 PM
    • Replies: 2
    • Views: 2,694
    02-07-2006, 11:47 PM Go to last post
  53. Help with Prob and Stat question

    I received a homework assignment back that was wrong and I'm not sure how to do the problem. The teacher is ignoring my questions on it. Can someone...

    Started by orangeb‎, 02-07-2006 09:37 PM
    • Replies: 5
    • Views: 2,977
    02-07-2006, 10:18 PM Go to last post
  54. Exclamation sampling probabitlity

    400 students were surveyed one week prior to the election for student body president regarding their choice of three candidates. The table below...

    Started by jessi‎, 02-06-2006 10:36 PM
    • Replies: 1
    • Views: 2,798
    02-06-2006, 10:47 PM Go to last post
  55. Exclamation probability help

    While visiting a daycare center, you estimate the ratio of toddlers to infants as 3:2. If the center has an enrollment of 25 children about how many...

    Started by jessi‎, 02-06-2006 10:27 PM
    • Replies: 1
    • Views: 2,616
    02-06-2006, 10:32 PM Go to last post
  56. Talking contingency table

    I am trying to build a contingency table but am confused. Here is the data I have: Probability that machine 1 will produce an irregular garment is...

    Started by MissNJ‎, 02-05-2006 05:35 PM
    • Replies: 3
    • Views: 3,750
    02-06-2006, 12:59 PM Go to last post
  57. Unhappy help with probability questions

    HELPPPPPPPPPPPPPPPPPPPPPPPPPP I am struggling with a introductory stats course, and am in need of some free help on some of my questions plse plse...

    Started by stressed with stats‎, 02-01-2006 11:51 PM
    • Replies: 10
    • Views: 6,941
    02-05-2006, 10:12 AM Go to last post
  58. Guidance please

    Need guidance. 2 machines, each produce half of the total garments Probability that an irregular garment will come from machine 1 is 0.05...

    Started by MissNJ‎, 02-04-2006 08:55 PM
    • Replies: 6
    • Views: 3,620
    02-04-2006, 10:05 PM Go to last post
  59. 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: 3,065
    02-04-2006, 09:02 PM Go to last post
  60. 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: 3,857
    02-02-2006, 11:56 PM Go to last post

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