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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: 12,798
    09-30-2005, 09:44 AM Go to last post
  1. Probability Ideas in the monty Hall problem Stats class assignment help!

    Watch a YouTube video that explains the problem: "Monty Hall Problem with Ron Clarke", this video starts with "Hello and welcome to the Monty Hall...

    Started by notastatswizard‎, Yesterday 02:36 AM
    • Replies: 2
    • Views: 111
    Yesterday, 04:48 PM Go to last post
  2. Help Please...

    I have no idea how to solve this problem A survey of undergraduate calculus and physics students showed that 58% of them had donated blood at...

    Started by Solodolo7‎, 06-29-2015 05:32 PM
    • Replies: 0
    • Views: 124
    06-29-2015, 05:32 PM Go to last post
  3. how to find MGF ?

    E(X^r)=(r+1)!* (2^r). we have to find MGF of random variable X.

    Started by Avnish29‎, 06-29-2015 02:38 PM
    mgf
    • Replies: 0
    • Views: 41
    06-29-2015, 02:38 PM Go to last post
  4. Please help!

    I am a 58 yr old Grandpa looking to see if there is Shananagan's are going on at my work. I want to find out the probability in this scenario. You...

    Started by geades‎, 06-29-2015 12:15 PM
    • Replies: 2
    • Views: 60
    06-29-2015, 01:19 PM Go to last post
  5. Expected value of absolute value without replacement

    I'm trying to figure something out for as a curiosity of mine, and I apparently can't remember enough of my college statistics class to solve it. If...

    Started by Akolas‎, 06-29-2015 10:54 AM
    • Replies: 1
    • Views: 31
    06-29-2015, 11:31 AM Go to last post
  6. Crying inside 😖 just can't quite get probability

    I'm taking stats online and this unit is on probability. I'm having a terrible time understanding it. The conditional probability rule is where I'm...

    Started by notastatswizard‎, 06-29-2015 03:03 AM
    • Replies: 0
    • Views: 66
    06-29-2015, 03:03 AM Go to last post
  7. Mapping a pdf to peaky pdf

    Hi All, From past few days I am trying to model this mapping function. I want to map a distribution(uniform/non-uniform) to a more peaky...

    Started by praj_7‎, 06-27-2015 12:44 PM
    • Replies: 0
    • Views: 93
    06-27-2015, 12:44 PM Go to last post
  8. Analysis of Squash Match

    I've been stuck on this problem for days. Any help, solutions or just pointers would be very welcome. A squash match is composed of a number of...

    Started by pvm‎, 06-25-2015 07:32 AM
    • Replies: 0
    • Views: 125
    06-25-2015, 07:32 AM Go to last post
  9. Lightbulb Higher standard deviation than the mean

    HI ! Excuse me for my english, my writing is not very good. I want to know what implies or what explains in an excercise when the standard deviation...

    Started by alvaroiv‎, 06-22-2015 06:55 PM
    • Replies: 3
    • Views: 211
    06-23-2015, 07:42 AM Go to last post
  10. Post WANT Theoretical Probabilities theory books suggestion

    Hello, I am reading a theoretical probability theory book " Probability Theory: The Logic of science " by E.T.Jaynes. But, this book is very advanced...

    Started by ansh23898‎, 06-20-2015 09:35 AM
    book, probability theory, theory
    • Replies: 1
    • Views: 187
    06-21-2015, 01:50 AM Go to last post
  11. Probability of completing multiples of objects

    Hey Guys! I'm struggling with a posed question about completing a set of objects and would really appreciate some direction. EX: There are 10...

    Started by Sigbog‎, 06-16-2015 07:45 PM
    • Replies: 3
    • Views: 217
    06-18-2015, 01:52 PM Go to last post
  12. Book recommendations for distributions?

    Hi everyone, I'm relatively new to stats (have done two beginner courses on it), and I feel like I learn best when I have an engaging book by my...

    Started by curious_notes‎, 06-17-2015 05:13 PM
    • Replies: 2
    • Views: 146
    06-17-2015, 10:15 PM Go to last post
  13. Monty Hall with Bayes Theorem

    hi, I just ran across a strange statement in the solution of the MH problem with Bayes as it is described here for instance...

    Started by rogojel‎, 06-17-2015 12:05 AM
    • Replies: 0
    • Views: 103
    06-17-2015, 12:05 AM Go to last post
  14. Calculating observed probability

    Can anyone point me towards the formula and extra reading I would need to calculate how many observations I would need to make in order to calculate...

    Started by ThomasCNot‎, 06-10-2015 08:41 AM
    confidence interval, observed probability
    • Replies: 3
    • Views: 276
    06-12-2015, 06:15 AM Go to last post
  15. hi every body

    hi everybody I'm new here I'm doing a research I have a questionnaire with 3 scales positive neutral negative which i want to do statics using...

    Started by hragaey‎, 06-10-2015 06:45 PM
    • Replies: 2
    • Views: 235
    06-11-2015, 09:21 AM Go to last post
  16. Getting standard deviation given probability

    Hi all If you have a mean of 2 and you want to get standard deviation with probability of 90% that the new mean will lie between 1.5 and 2.5. I...

    Started by Ahmed Arnous‎, 06-10-2015 01:08 PM
    • Replies: 4
    • Views: 128
    06-10-2015, 03:31 PM Go to last post
  17. CHI^2 test for binomial variables which are not normally distributed

    Hello, Assume that you have X_1\cdot X_n independant random variables. If they are normally distributed we can use the Chi^2 statistical test to...

    Started by CBW‎, 06-10-2015 07:59 AM
    • Replies: 0
    • Views: 95
    06-10-2015, 07:59 AM Go to last post
  18. Conditional density, bivariate normal

    Let Z=X+Y where X \sim N(\mu,\sigma^2) and Y \sim N(0,1) are independent. What is the conditional density of X given Z, f_{X|Z}(x|z)? I already...

    Started by askazy‎, 06-09-2015 09:26 PM
    bivariate normal, conditional density
    • Replies: 3
    • Views: 167
    06-10-2015, 05:51 AM Go to last post
  19. Probability Applications - Drawing from a Deck of Cards

    Hi! I am having trouble figuring out how to go about solving the following problem: "Find the probability of obtaining the given 5-card poker...

    Started by punky3295‎, 06-06-2015 12:04 PM
    cards problem, probability, statistics
    • Replies: 1
    • Views: 247
    06-06-2015, 12:35 PM Go to last post
  20. What is the probability of not drawing a club from a deck of cards

    Hi, Can someone help me with this please? You draw 40 playing cards, 1 at a time, with replacement from a standard deck. What is the probability...

    Started by pawilliams‎, 06-05-2015 03:53 AM
    • Replies: 2
    • Views: 226
    06-05-2015, 07:43 AM Go to last post
  21. Random numbers

    Hello, let me go direct to point: Let's say i have a total of 60 numbers (1-60) and i can generate 6 random numbers among them, in this case: 5,...

    Started by msw‎, 06-01-2015 01:28 AM
    • Replies: 11
    • Views: 460
    06-05-2015, 04:34 AM Go to last post
  22. Probability of solder ball inside a sealed package able to cause a failure

    I have a hermetically sealed semiconductor package, NAND. And I have some foreign object debris (FOD), solder balls to be exact, inside this device....

    Started by ChootarLaal‎, 06-04-2015 09:21 AM
    • Replies: 0
    • Views: 136
    06-04-2015, 09:21 AM Go to last post
  23. Probability of default

    What is the probability of default in 2 years? The probabilit of default year 1= 10% The probability of default year 2 = 10%

    Started by kronofogdn‎, 06-04-2015 02:03 AM
    • Replies: 0
    • Views: 98
    06-04-2015, 02:03 AM Go to last post
  24. My program TARGETS

    I used a Monte Carlo method of finding probabilities of collisions between a randomly tossed circular block and non-overlapping randomly placed...

    Started by ArtK‎, 06-03-2015 02:42 PM
    • Replies: 0
    • Views: 152
    06-03-2015, 02:42 PM Go to last post
  25. Probability

    This is not part of any homework, but an odd occurrence that happened within our family and I'd just like to find out what the chances/odds of this...

    Started by NOTamathguy‎, 05-29-2015 07:22 AM
    • Replies: 4
    • Views: 330
    05-29-2015, 09:54 PM Go to last post
  26. Generate simulation data with PDF and ACF

    Dear I'am trying to model a wireless channel based on throughput measurements. I've processed the measurements and approximated the PDF of the...

    Started by Pieter Cardoen‎, 05-27-2015 03:53 AM
    • Replies: 4
    • Views: 322
    05-27-2015, 09:30 AM Go to last post
  27. Probability to win

    Hello, I would like to calculate the probability to win 3 times in a lottery considering the following: 1 - the chance to win 1 time is 1 in...

    Started by Marcus5800‎, 05-24-2015 07:21 PM
    lottery
    • Replies: 11
    • Views: 383
    05-25-2015, 01:54 PM Go to last post
  28. probability of 8 successes out of 256 events

    Hi all hope you are well, i was trying to calculate what the probability of getting exactly 8 successes in 256 events. I used a Binomial on line...

    Started by censura‎, 05-21-2015 02:44 AM
    • Replies: 5
    • Views: 370
    05-25-2015, 06:12 AM Go to last post
  29. probability of choosing number

    I have a question related to probability of choosing numbers. If there is 5 people picking numbers from 1 to 5, there is 5^5 ways to pick...

    Started by ikemen‎, 05-24-2015 01:03 AM
    • Replies: 1
    • Views: 191
    05-25-2015, 05:47 AM Go to last post
  30. Question Bayes's Theorem

    Hi! Say there is a deck of 100 cards: Red w/ numbers = 40 Red w/ figures=15 Black w/ numbers=35 Black w/ figures=10 The only information...

    Started by DrAnthonyRodriguez‎, 05-22-2015 07:42 AM
    bayes' theorem
    • Replies: 4
    • Views: 236
    05-23-2015, 03:22 AM Go to last post
  31. Probability definition

    Hi stats guys, I had a heated discussion about the following situation today: Letís say I have a function f(x) producing values between 0 and...

    Started by Stats_Newbie‎, 05-22-2015 09:48 AM
    • Replies: 6
    • Views: 208
    05-22-2015, 10:40 AM Go to last post
  32. A little help

    I know that a event with two outcomes such as making a three throw in basketball doesn't necessarily have a probability of 0.50, it could range...

    Started by misterx‎, 05-16-2015 08:41 AM
    • Replies: 1
    • Views: 292
    05-18-2015, 07:42 AM Go to last post
  33. differential distribution frequency

    Hi there. pls I'm studying the production of energy from sawdust.So I need a firm grip in powder technology.Can anyone pls show me mathematically how...

    Started by PSDman‎, 05-14-2015 03:26 PM
    • Replies: 0
    • Views: 184
    05-14-2015, 03:26 PM Go to last post
  34. Bayesian Convergence

    I have to go to bed any minute, so I apologize for the lack of detail provided. I was thinking about repeated testing and how probabilities...

    Started by hlsmith‎, 05-10-2015 10:04 PM
    • Replies: 7
    • Views: 366
    05-13-2015, 03:26 AM Go to last post
  35. Combination of families of fragility curves (cumulative probability functions)

    Hi guys, I am a geotechnical engineer and currently involved in a project for risk calculation of an embankment dam. It's my first post here, I am...

    Started by sandreev‎, 05-11-2015 09:42 AM
    conditional probability, engineering, fragilities, uni-modal limits theorem
    • Replies: 0
    • Views: 193
    05-11-2015, 09:42 AM Go to last post
  36. Wink Probability on Roulette. Just curious!

    Hello all. Could you help me? I have been discussing the following topic with my work teammates; We were talking about statistics and...

    Started by thenewone‎, 05-08-2015 07:30 PM
    bayers theorem, chaos, random, roulette
    • Replies: 2
    • Views: 266
    05-11-2015, 09:26 AM Go to last post
  37. Probability of relations in a network

    Imagine i have a predicate $friends(p_1, p_2)$ and I know that $p(friends(p_1, p_2)) = p_1$. If I generate a world of $n$ people, I expect there to...

    Started by d.hammer‎, 05-08-2015 07:29 AM
    graph, probability
    • Replies: 0
    • Views: 164
    05-08-2015, 07:29 AM Go to last post
  38. Google Earth circles probability

    Hi everyone. Not sure if this is the right forum but I'll give it a go. Q: If you draw a circle on a sphere, what are the odds that a randomly...

    Started by BedrockGeometry‎, 05-07-2015 05:27 AM
    • Replies: 3
    • Views: 243
    05-07-2015, 08:58 AM Go to last post
  39. dice rolling odds. please help!

    Suppose you have a FIVE sided dice. One of the sides has a star on it, the other four sides are blank. Suppose you rolled it 10 times. What are the...

    Started by ospreyx‎, 05-06-2015 06:59 PM
    dice, odds, probability, statistics
    • Replies: 1
    • Views: 170
    05-06-2015, 08:38 PM Go to last post
  40. Data probability/density

    Hi, hope im in the right place. Im trying to find the best way to characterize the different data on this space? to 3 draw regions (or lines with...

    Started by barakah‎, 05-01-2015 09:47 AM
    • Replies: 4
    • Views: 329
    05-01-2015, 03:45 PM Go to last post
  41. Simple concrete example of Wold theorem?

    I'm reading the Wold decomposition theorem for time series in http://faculty.chicagobooth.edu/john.cochrane/research/papers/time_series_book.pdf. ...

    Started by JustAengineer‎, 04-29-2015 10:25 PM
    time series, wold theorem
    • Replies: 0
    • Views: 255
    04-29-2015, 10:25 PM Go to last post
  42. Probabilities and Monte-Carlo simulations - How to rank?

    I'm not that statistically clued up within this particular area but it's an issue I am facing for work (bizarrely) and am having trouble of working...

    Started by winters‎, 04-27-2015 02:35 PM
    • Replies: 8
    • Views: 378
    04-28-2015, 10:45 AM Go to last post
  43. Poll Poll: A probability problem

    Hi all, I would like to solve the problem bellow. To some it might seem to eassy. However i would appreciate some hints. Thanks in advance ... ...

    Started by marius15‎, 04-26-2015 08:49 AM
    • Replies: 7
    • Views: 340
    04-26-2015, 04:51 PM Go to last post
  44. Binomial question?

    I have this question that I think is binomial probability. Bananas that are almost ripe to pick carry the chance of being 15% rotten. What would be...

    Started by chrismyers1‎, 04-23-2015 09:42 AM
    • Replies: 3
    • Views: 311
    04-26-2015, 02:11 PM Go to last post
  45. Compound Probability

    Hey guys, i am having a bit of trouble with this basic probability question which shows that i do not understand the basics at all. The question...

    Started by daandrew‎, 04-18-2015 11:39 AM
    baseball, compound probability, probability
    • Replies: 4
    • Views: 324
    04-26-2015, 10:01 AM Go to last post
  46. Exercises with answers

    Hello probabilitygeniuses I am very new to probabilities and would like to ask if there are online resources with loads of probability...

    Started by molly‎, 04-15-2015 09:29 AM
    • Replies: 5
    • Views: 369
    04-26-2015, 09:29 AM Go to last post
  47. Do independent experiments lend extra weight to probability?

    There are two categories of objects, A and B. From long term observation, experiment 1 is known to be 70% accurate i.e. it predicts type A or B...

    Started by Nquisitive‎, 04-24-2015 02:39 PM
    combining probabilities, independent experiments
    • Replies: 2
    • Views: 270
    04-25-2015, 02:01 AM Go to last post
  48. Immortality and Conditional Probability

    - Hopefully, I won't aggravate readers so much with this approach. - Here, my claim is simply that the likelihood of my current existence is...

    Started by Jabba‎, 04-13-2015 10:20 AM
    5 Pages
    1 2 3 ... 5
    • Replies: 71
    • Views: 2,405
    04-22-2015, 06:50 AM Go to last post
  49. How to calculate these 3 questions ? Please help

    How to calculate these 3 questions ? :shakehead I want to know the steps and answer, thank you

    Started by peter369369‎, 04-21-2015 10:19 AM
    • Replies: 1
    • Views: 304
    04-21-2015, 10:30 AM Go to last post
  50. task about CTR

    Hi guys! I have a question: There is link on the main google page with CTR 1.5% (CTR is number of clicked visitors divided by number of all...

    Started by bchep‎, 04-19-2015 11:51 AM
    • Replies: 0
    • Views: 191
    04-19-2015, 11:51 AM Go to last post
  51. Redundancy probability in employment

    The idea of being made redundant after working so many years in a company is everyone's nightmare. I am currently working in a company employing...

    Started by casy‎, 04-17-2015 03:17 PM
    probability help
    • Replies: 2
    • Views: 274
    04-18-2015, 01:40 AM Go to last post
  52. Smile Using MLE to find the right distribution

    Hi, I know that MLE can be used to find the best fitting parameter assuming a that the distribution is known, but is there a way (using Excel or...

    Started by dstat2‎, 04-13-2015 10:20 AM
    distribution probability, excel, mle, parameter estimates, sas
    • Replies: 2
    • Views: 281
    04-15-2015, 10:20 PM Go to last post
  53. How to calculate combined probability of causally-linked events: joint probability?

    Hello, I'm a statistics novice trying to understand how to approach what I suspect is a fairly basic probability problem. I'd be very grateful for...

    Started by jimi‎, 04-15-2015 06:44 AM
    • Replies: 0
    • Views: 199
    04-15-2015, 06:44 AM Go to last post
  54. How to efficiently allocate marketing dollars among various media?

    Should I use expected return on investment for the Net, direct mail flyers, cold calling, etc., and then divide the money or just dump all of it...

    Started by Outlier‎, 04-14-2015 01:12 PM
    • Replies: 0
    • Views: 204
    04-14-2015, 01:12 PM Go to last post
  55. The probability of cannibalism

    Hi, I am interested in calculating the probability of cannibalism occurring in groups of fish (25). The species I am looking at are known to...

    Started by JibbaJabba‎, 04-13-2015 11:41 PM
    • Replies: 1
    • Views: 175
    04-14-2015, 01:03 AM Go to last post
  56. Exclamation Joint Distributions and a 3rd Variable

    I am struggling with this probability problem. Consider the random variables X and Y with joint distribution as given below. X 0 1 ...

    Started by kathharr‎, 04-12-2015 09:25 AM
    • Replies: 1
    • Views: 238
    04-12-2015, 10:53 AM Go to last post
  57. Risk Management

    There is 3% coral coverage in a sea area of l=200m b=5m. The size(diameter) of each coral is 50 cm. If we throw a block of 1m2 in the area. How many...

    Started by Mr Good News‎, 04-10-2015 02:52 AM
    probability
    • Replies: 2
    • Views: 340
    04-11-2015, 07:36 PM Go to last post
  58. Question Continuous joint entropy with fully dependent variable

    Consider a variable X with a continuous uniform distribution in the interval and a variable Y that is fully dependent on X, i.e., p(Y=y |...

    Started by ASML‎, 04-11-2015 04:59 PM
    dependence, entropy, joint distribution
    • Replies: 0
    • Views: 209
    04-11-2015, 04:59 PM Go to last post
  59. Searching for a probability distribution where expected value is zero.

    Hi, I am working on an agent based model. And, in the model every agent has an action. The action leads to a certain pay-off. The assumption is...

    Started by Neha‎, 04-08-2015 12:11 PM
    probability function, random draw
    • Replies: 1
    • Views: 280
    04-08-2015, 01:25 PM Go to last post
  60. Immortality & Bayesian Statistics

    - I seem to have written an 8 page paper virtually proving -- through Bayesian statistics -- that we are immortal (or something similar). Obviously,...

    Started by Jabba‎, 03-16-2015 10:12 AM
    6 Pages
    1 2 3 ... 6
    • Replies: 81
    • Views: 4,269
    04-06-2015, 05:11 PM Go to last post

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