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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: 30,234
    09-30-2005, 09:44 AM Go to last post
  1. Probability Conjecture

    " it has been found that with the standard dosage of a drug, the change in a persons uric-acid level has mean=250 and standard deviation = 50. A new...

    Started by kelly g‎, 03-26-2012 08:43 PM
    • Replies: 1
    • Views: 2,246
    03-27-2012, 09:37 AM Go to last post
  2. 97th percentile

    "suppose the moisture content per pound of a dehydrated protein concentrate is normally distributed with a mean of 3.5 and standard deviation of 0.5....

    Started by kelly g‎, 03-26-2012 08:36 PM
    • Replies: 5
    • Views: 7,466
    03-26-2012, 10:34 PM Go to last post
  3. Normal Distribution Question.

    Hello everyone! Thanks in advance for any help you can give me. I am in my first year of college, currently taking a MAT 103 class (Quantitative...

    Started by Lewisite‎, 03-26-2012 02:32 PM
    • Replies: 1
    • Views: 6,146
    03-26-2012, 04:32 PM Go to last post
  4. Branching Process

    I attach the following question about branching processes. Any hints/help on how to proceed with my proof would be greatly appreciated! Regards

    Started by Darktranquillity‎, 03-26-2012 07:03 AM
    • Replies: 0
    • Views: 1,396
    03-26-2012, 07:03 AM Go to last post
  5. Horse Racing Stats question

    not sure this is the correct area so forgive me. my boyfriend is an avid horse racing fan and created pretty accurate measurements as far as...

    Started by Leia‎, 03-25-2012 04:58 PM
    • Replies: 0
    • Views: 2,241
    03-25-2012, 04:58 PM Go to last post
  6. Red fish, golden fish, probability.

    Hello, can you help me with these exercises? A hint would be useful :) 1) A pond contains red and golden fish. There are 3000 red and 7000 golden...

    Started by Kol‎, 03-24-2012 09:47 PM
    • Replies: 1
    • Views: 2,273
    03-25-2012, 06:16 AM Go to last post
  7. Determining on Probability from multiplt associative probabilities

    Hi, I have a question regarding the associative laws of probabilty. Basic question is that I need to find the probability of a player X...

    Started by sandeepy02‎, 03-24-2012 12:09 AM
    • Replies: 0
    • Views: 1,102
    03-24-2012, 12:09 AM Go to last post
  8. Rick Durrett definition of markov property

    Dear forumers This is my first post - I hope this is the right place for the post and that this forum covers these kind of questions. I have...

    Started by zuki‎, 03-23-2012 01:52 PM
    • Replies: 0
    • Views: 1,849
    03-23-2012, 01:52 PM Go to last post
  9. Collect answers and determine probability

    Hello! I'm trying to figure out a method to predict the most probable answer taking into account previous answers collected in a database. ...

    Started by alfred‎, 03-22-2012 12:10 PM
    prediction, probability
    • Replies: 0
    • Views: 1,299
    03-22-2012, 12:10 PM Go to last post
  10. Real world statistical/probability question.

    Hi I have a question relating to probability from normal distributions. My field is customer service in manufacturing industry and I am...

    Started by wassteve‎, 03-22-2012 04:26 AM
    • Replies: 0
    • Views: 1,707
    03-22-2012, 04:26 AM Go to last post
  11. probability for the event

    Hi I have numbers 0-200. If I randomly choose one, what is the probability for the event that value of the chosen number is less than 120? My...

    Started by laphigh‎, 03-20-2012 09:27 AM
    • Replies: 2
    • Views: 2,069
    03-20-2012, 09:51 AM Go to last post
  12. binomial probability

    ok so here is the question i attempted but no getting the answer a loan officer has indicated that 80% of all loan application forms have zero...

    Started by cushane‎, 03-19-2012 06:48 PM
    • Replies: 0
    • Views: 2,414
    03-19-2012, 06:48 PM Go to last post
  13. Building a Multivariate Exponential Distribution...

    hey everyone! so when i asked about the Multivariate Poisson i was pointed in the right direction and was able to come up with a much decent answer...

    Started by spunky‎, 03-19-2012 05:40 PM
    • Replies: 2
    • Views: 4,213
    03-19-2012, 06:44 PM Go to last post
  14. Confidence Intervals using Most Likely Estimators

    I have data that follows an exponential distribution. I need to find a 95% confidence interval of the following (using the MLE function): 1. The...

    Started by APOCooter‎, 03-18-2012 01:37 PM
    • Replies: 3
    • Views: 1,806
    03-18-2012, 03:37 PM Go to last post
  15. Mann Whitney vs Kolmogrov-Smirnov Z ?

    Hi forum, I'm brand new here. :wave: I'm working on my master's thesis in behavioral finance. I'm trying to ascertain whether temperature has an...

    Started by zaghloul‎, 03-17-2012 04:48 PM
    • Replies: 2
    • Views: 1,952
    03-17-2012, 05:21 PM Go to last post
  16. Question about hitting times for strong Markov Processes

    Suppose X is a strong Markov process on (Omega, F, P_x) with right continuous sample paths (assume X takes values in R). Suppose that Law (X | P_x)...

    Started by natt010‎, 03-17-2012 08:02 AM
    • Replies: 0
    • Views: 1,714
    03-17-2012, 08:02 AM Go to last post
  17. Building a Multivariate Poission Distribution....

    hello peeps. i know i haven't posted in like ages but i've been very, very VERY busy lately so i hope i get more time once the semester ends. ...

    Started by spunky‎, 03-16-2012 11:26 AM
    • Replies: 5
    • Views: 3,063
    03-16-2012, 01:03 PM Go to last post
  18. probability of underestimating regression estimate

    Dear all, This is a really basic question but I am stuck for some reason. Technically this is econometrics, but the question involves probability...

    Started by ida‎, 03-15-2012 06:51 PM
    • Replies: 0
    • Views: 1,240
    03-15-2012, 06:51 PM Go to last post
  19. incremental Mutual information

    I computed Mutual information between two variables X and Y from data D at time t. I(X,Y) from D. Now at time t+1 new data arrived so, how i...

    Started by aman‎, 03-15-2012 05:53 PM
    entropy, mutual information, probability theory
    • Replies: 0
    • Views: 1,667
    03-15-2012, 05:53 PM Go to last post
  20. Probability Distribution Function

    Hi Every one. Can any one help me to start solving this problem?i am stocked in the beginning. The range of a ballistic projectile is given by ...

    Started by 22nelson‎, 03-13-2012 09:44 PM
    pdf cdf
    • Replies: 6
    • Views: 2,131
    03-15-2012, 03:49 AM Go to last post
  21. Help with normal approximation to the binomial distribution

    Hi all, I need help with a question I have for class. The question is: The the normal approximation to the binomial distribution to estimate the...

    Started by Airwolf‎, 03-11-2012 10:06 PM
    • Replies: 2
    • Views: 2,602
    03-14-2012, 02:52 AM Go to last post
  22. Confusion about binomial and hypergeometric

    I have a question. Let's say only 15 out of 50 job candidates can get the job at a company. (30%) Would an individual prefer sampling WITH...

    Started by rocketscientist82‎, 03-13-2012 11:49 PM
    • Replies: 0
    • Views: 1,215
    03-13-2012, 11:49 PM Go to last post
  23. Probability

    Here's the question I've been working on for hours now... Experience of the coach concluded that fifty percent of the players who attempt to...

    Started by goodpup‎, 03-13-2012 06:53 PM
    • Replies: 4
    • Views: 2,039
    03-13-2012, 09:50 PM Go to last post
  24. Applying distribution theory to scoring events in a sports match

    Hi! Sorry for the long message - but I think it's an interesting problem in the sports world and is meant for practical, real-world use - so...

    Started by iambasil‎, 03-12-2012 09:04 PM
    • Replies: 0
    • Views: 1,523
    03-12-2012, 09:04 PM Go to last post
  25. Probability Density Problem

    Can you figure this out? A New Distribution. Consider the probability density function f(x) =(a/a+1)((ln(ax)+(1/x)+ln(a))) and...

    Started by rocketscientist82‎, 03-12-2012 07:43 PM
    • Replies: 1
    • Views: 2,437
    03-12-2012, 08:07 PM Go to last post
  26. Question Puzzling problem

    King Zack's kingdom is on the brink of war with the neighboring kingdom of Yarmouth. King Zack has three advisors, Alfred, Belle, and Chris. ...

    Started by bioniclime‎, 03-12-2012 12:30 PM
    • Replies: 3
    • Views: 1,510
    03-12-2012, 01:48 PM Go to last post
  27. Bounds on the probability

    Hey I have a problem. There are three contenders (!,B and C) for a resource. The probability that any one wins would naturally be 1/3. But...

    Started by sibtain125‎, 03-12-2012 08:59 AM
    • Replies: 0
    • Views: 1,071
    03-12-2012, 08:59 AM Go to last post
  28. Binomial probability

    Hello!! My question is: Only 30% of the people in a large city feel that mass transit system is adequate. If 20 different persons are selected at...

    Started by kelly g‎, 03-10-2012 03:42 PM
    • Replies: 11
    • Views: 4,145
    03-10-2012, 06:57 PM Go to last post
  29. random question about non-Guassian multivariate distributions...

    today in my seminar we were talking about all these interesting ways people can start with random uniform distributions and through doing and...

    Started by spunky‎, 03-07-2012 07:19 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 4,481
    03-09-2012, 07:55 PM Go to last post
  30. lock combinations Q- for fun, not work

    Suppose I want to crack a safe. What I know: The lock has numbers ranging from 0-75 The numbers can be repeated What I don't know: Whether...

    Started by csc2iffy‎, 03-09-2012 05:34 PM
    • Replies: 0
    • Views: 1,588
    03-09-2012, 05:34 PM Go to last post
  31. Baye's Rule Help

    Hello I have this question and I am having trouble figuring it out. Medical case histories indicate that different illnesses may produce...

    Started by HHPS‎, 03-08-2012 06:17 PM
    • Replies: 3
    • Views: 4,759
    03-09-2012, 12:43 PM Go to last post
  32. Random Variable with normal distribution

    I am stuck on this problem. Mean of 50, standard deviation of 10. What is the probability the random variable will assume a value between 45...

    Started by chiquitabonita‎, 03-08-2012 03:17 PM
    • Replies: 1
    • Views: 2,574
    03-08-2012, 03:40 PM Go to last post
  33. Probability Only With Return Rate?

    It is asked that, Printed Circuit Boards (PCB's) are used in virtually all electronic goods (PC's, cell phones, etc). The facility producing PCB's...

    Started by sukaloop‎, 03-08-2012 02:33 PM
    • Replies: 2
    • Views: 2,039
    03-08-2012, 02:42 PM Go to last post
  34. Advantage of reducing process variation?

    The question is, "What is the advantage of reducing process variation, thereby causing process control limits to be at a greater number of standard...

    Started by sukaloop‎, 03-02-2012 02:59 PM
    • Replies: 4
    • Views: 8,154
    03-08-2012, 02:30 PM Go to last post
  35. continuous joint p.d.f.

    Hi guys :yup: I am struggling with this probability problem, and I would really appreciate some help! If someone could check over what I have so far...

    Started by csc2iffy‎, 03-08-2012 04:08 AM
    • Replies: 3
    • Views: 2,627
    03-08-2012, 11:53 AM Go to last post
  36. probability density function questions...

    Suppose X selects an integer, x, uniformly from the set S = {0,1,...,9}. Then Y selects an integer uniformly from {0,1,...,x^2}. Find: (a) f(x,y) ...

    Started by csc2iffy‎, 03-07-2012 11:33 PM
    • Replies: 1
    • Views: 2,139
    03-08-2012, 12:14 AM Go to last post
  37. Probability with Mice

    My question states: Suppose 9 mice are available for a study of a possible carcinogen and 4 of them will form a control group. Assuming that a...

    Started by kelly g‎, 03-07-2012 02:09 PM
    • Replies: 4
    • Views: 2,824
    03-07-2012, 03:49 PM Go to last post
  38. Another probability...

    My question: An advisory committee on prison reform consists of 15 members. 9 favor, 4 oppose and 2 are indifferent about a certain program. If we...

    Started by kelly g‎, 03-07-2012 02:17 PM
    • Replies: 2
    • Views: 2,020
    03-07-2012, 03:33 PM Go to last post
  39. Smile How do you find best probability density distribution for a data set?

    How do you find the best probability density distribution that fits a particular data set? Is there any software that will take a data set and run...

    Started by Jim21‎, 11-03-2009 02:30 PM
    • Replies: 2
    • Views: 7,981
    03-07-2012, 02:15 PM Go to last post
  40. probability with mean and standard deviation

    The local hardware store sells screws in 1lb bags. Because the screws aren't identical, the number of screws per bag, although distributed...

    Started by i need a brain‎, 06-04-2008 05:46 PM
    • Replies: 4
    • Views: 61,268
    03-06-2012, 05:20 PM Go to last post
  41. Binomial Distribution

    I really need help with this homework. I've been on one question for over an hour. The Question is The rates of on-time flights for commercial...

    Started by PitaTheGreat‎, 03-05-2012 06:33 PM
    binomial distribution, probability
    • Replies: 9
    • Views: 11,902
    03-05-2012, 07:24 PM Go to last post
  42. Stat Question - Exponential Distribution

    Suppose that 5 components are sequentially connected in a such a way that the whole system works as long as all of them work. Assume that the...

    Started by geo43‎, 03-05-2012 05:01 PM
    • Replies: 1
    • Views: 2,734
    03-05-2012, 07:00 PM Go to last post
  43. Bayes thoerem, can you check my solution please?

    Hi, I'm terrible at statistics, i hope someone can help. A ship sank into the sea and is now laying in a fixed but uknown position on the bottom...

    Started by any_body‎, 03-05-2012 07:59 AM
    bayes thoerem
    • Replies: 6
    • Views: 2,173
    03-05-2012, 12:20 PM Go to last post
  44. Bias of ratio estimator of pop.mean, DOUBLE POST

    I need to explain why the ratio estimator of the population mean is biased or unbiased. I am fairly certain that it is a biased estimator but I don't...

    Started by alias‎, 03-05-2012 12:29 AM
    • Replies: 0
    • Views: 2,299
    03-05-2012, 12:29 AM Go to last post
  45. Poisson Distribution

    I am confused with my calculator I think! Lol We started the Poisson distribution and I am terrible with writing the formula in this forum so I...

    Started by kelly g‎, 03-04-2012 06:59 PM
    • Replies: 1
    • Views: 1,518
    03-04-2012, 07:28 PM Go to last post
  46. Pascal Random Variable

    I've got a test coming up and I'm redoing all of my old homework to make sure I understand everything. I ran across this gem and really have no clue...

    Started by beanus‎, 03-03-2012 07:56 PM
    • Replies: 0
    • Views: 3,873
    03-03-2012, 07:56 PM Go to last post
  47. Derived Random Variable

    Can someone please explain the idea behind this to me? My text says "Assume X is a random variable. Then we can define another r.v. Y = g(X). ...

    Started by beanus‎, 03-02-2012 07:19 PM
    • Replies: 2
    • Views: 3,517
    03-03-2012, 07:43 PM Go to last post
  48. Function of a RV

    X~N(mu,sigma^2) Find pdf of Y=aX^2+bX+c I know that if X is normally distributed then if Y=aX+b, Y~N(a*mu+b, a^2*sigma^2). Is there a similar...

    Started by BiGsombrerO‎, 03-03-2012 03:27 PM
    • Replies: 1
    • Views: 1,952
    03-03-2012, 04:05 PM Go to last post
  49. In how many ways can 14 be rolled using 4, 6 sided dice?

    Hello, I am stuck in trying to figure out a possible number of permutations in which a certain sum of all dices rolled can be reached. For...

    Started by Akavall‎, 03-01-2012 10:02 PM
    • Replies: 3
    • Views: 6,101
    03-02-2012, 10:59 PM Go to last post
  50. On Correlation Matrices

    Hi. This is a question from a question bank. I am self-studying for upcoming MS exam. a)Random vector X, elements are independent and zero mean....

    Started by alidemedi‎, 03-01-2012 11:13 PM
    • Replies: 6
    • Views: 2,209
    03-02-2012, 12:16 AM Go to last post
  51. Question Probability Problem... Coins x Cards and Coins x Dice

    Hi, new here. I created this account to just ask this one question (although I will probably ask or answer others for the duration of my AP Stats...

    Started by lluke9‎, 02-29-2012 08:17 PM
    • Replies: 3
    • Views: 2,942
    03-01-2012, 09:50 PM Go to last post
  52. Intelligence vs. Possibility: 10 chicks 10 eggs

    Hi all, We have a complicated question. Please make your best effort to answer it :yup: Chick Problem: There are 200 chicks. When they are...

    Started by hichlik‎, 03-01-2012 09:43 AM
    choosing game, intelligent test, possibility
    • Replies: 1
    • Views: 2,304
    03-01-2012, 10:00 AM Go to last post
  53. Lottery Draft Question

    Hi! I'm trying to figure out the odds of each team getting each pick in our NHL fantasy league lottery draft. It is somewhat modeled after the...

    Started by Commissioner_rumY‎, 03-01-2012 01:00 AM
    • Replies: 1
    • Views: 3,108
    03-01-2012, 02:08 AM Go to last post
  54. Probability question:??

    If I have 2 coins the first coin is a fair coin and sec one is two head. I randomly pick one and toss it twice, the result are both head for two...

    Started by Adam.‎, 02-29-2012 01:16 PM
    • Replies: 8
    • Views: 2,364
    02-29-2012, 06:09 PM Go to last post
  55. The Mean and Std. Deviation of a probability distribution

    Q: Select a bill from a box that contains 3 $1 bills, 2 $5 bills, 2 $10 bills, 3 $20 bills. a) Construct a probability distribution b) Find the...

    Started by Scarecrow‎, 02-29-2012 01:22 PM
    • Replies: 4
    • Views: 3,306
    02-29-2012, 04:53 PM Go to last post
  56. To use binomial or not to use binomial?

    "For fans who visit the celebrity facebook page, 15% will click the ad on the page. Each click on the ad link will generate a $0.05 income. For a...

    Started by cys920622‎, 02-29-2012 04:21 AM
    • Replies: 3
    • Views: 1,530
    02-29-2012, 05:49 AM Go to last post
  57. Two questions: one about bias/MSE and one about confidence intervals

    1. Y1, Y2, .... , Yn are a random sample from the Poisson distribution with parameter (mean) lambda > 0. Show that the square root of the sample...

    Started by APOCooter‎, 02-28-2012 05:56 PM
    • Replies: 1
    • Views: 1,965
    02-29-2012, 05:42 AM Go to last post
  58. Probability of a team making the finals

    Hi, I am trying to find how to calculate the probability of "x" number of events happening within "y" opportunities. However each opportunity has...

    Started by listmanager‎, 02-28-2012 08:00 PM
    probability, probability distributions, probability help, probability question, probability theory
    • Replies: 7
    • Views: 2,010
    02-28-2012, 09:36 PM Go to last post
  59. Request for help developing a commercial solution

    Firstly, I apologise if I am in the wrong place. In a business context we need to produce a model to help planning tasks. We are a small commercial...

    Started by DAvidA1‎, 02-28-2012 12:02 PM
    • Replies: 0
    • Views: 1,329
    02-28-2012, 12:02 PM Go to last post
  60. A self study question for extreme probability....Gaming-Cards.

    No, this does not have to do with any current games on the market.... I have a unique question for anyone that can explain it to me. I'm a bit of a...

    Started by myrlin2k‎, 02-28-2012 11:28 AM
    • Replies: 3
    • Views: 1,693
    02-28-2012, 11:54 AM Go to last post

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