1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,934
+ Post New Thread
Page 20 of 91 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 70 ... LastLast
Threads 1141 to 1200 of 5452

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: 30,373
    09-30-2005, 09:44 AM Go to last post
  1. Question Manufacturing machine probability problem

    There are three possible environment conditions: normal, rainy and hot. Rainy and hot days may be risky to a system that has been deployed, but...

    Started by deathlives‎, 03-04-2016 10:36 PM
    exam, probability, random
    • Replies: 5
    • Views: 3,269
    03-06-2016, 02:29 AM Go to last post
  2. Astronomer's estimate

    I am trying to solve the problem but end up with no where, Please help me to solve the problem Astronomers estimate that as many as one hundred...

    Started by debaprosad‎, 09-15-2014 11:46 AM
    • Replies: 3
    • Views: 2,559
    09-16-2014, 03:59 PM Go to last post
  3. Question Terribly confused-binomial distribution & profit

    Would someone kindly take a look at this problem? The link is to the book page in google books. (it is a long problem). I seem to have parts 1 and 2...

    Started by debsbaby‎, 03-22-2010 08:19 AM
    • Replies: 0
    • Views: 2,208
    03-22-2010, 08:19 AM Go to last post
  4. Joint Probability

    X and Y below are independent: How am I going to solve the joint probability? Am I correct if I solve it this way:

    Started by dEconomist‎, 03-08-2011 10:46 AM
    • Replies: 1
    • Views: 2,976
    03-08-2011, 11:10 AM Go to last post
  5. Combination or Permutation

    Please see the attached file. I obtained the answer by writing down the outcome sets. I wondered if they were correct. May I ask, how do we compute...

    Started by dEconomist‎, 12-29-2011 12:41 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 4,679
    12-31-2011, 08:56 AM Go to last post
  6. Medals at the Olympics

    Hi, I love sports and stats and so I am doing my Olympics research. I saw that there are 2 players from China's on each Badminton competition (MS,...

    Started by Dedes‎, 07-05-2016 04:34 AM
    combinations, olympics, probabilities, sports
    • Replies: 0
    • Views: 1,622
    07-05-2016, 04:34 AM Go to last post
  7. Travelling

    Hi, Still on my quest to sort probabilities problems involving time, I was trying to get help on this: If my car is traveling at 100 km / h in...

    Started by Dedes‎, 10-06-2016 10:27 PM
    • Replies: 2
    • Views: 2,455
    10-07-2016, 01:36 AM Go to last post
  8. Lightbulb Racing

    Hi all, I need some help with some statistical work: So, I am trying to understand how I can transform time into probability. I have 2...

    Started by Dedes‎, 10-03-2016 08:48 AM
    betting, normal distribution, probability, time frames
    • Replies: 0
    • Views: 2,134
    10-03-2016, 08:48 AM Go to last post
  9. Normal Distrubtion question

    Hi, I have this question that I can not figure out: Suppose that in an apartment building run by the Probandstat rental company, the inhabitants's...

    Started by DeerPark‎, 12-04-2010 02:52 PM
    • Replies: 1
    • Views: 3,788
    12-04-2010, 04:17 PM Go to last post
  10. Probablity

    Hi Suppose there are 2000 capsules from Manufacturer A, 3000 capsules from Manufacturer B, and 1000 capsules from Manufacturer C. Each...

    Started by DeerPark‎, 12-08-2010 11:17 AM
    • Replies: 4
    • Views: 3,612
    12-09-2010, 12:08 PM Go to last post
  11. Combination permutation

    Suppose that from a class of students (of whom 14 are male and 16 are female), a committee of 10 students is chosen at random. The committee then...

    Started by DeerPark‎, 12-08-2010 11:23 AM
    • Replies: 0
    • Views: 3,301
    12-08-2010, 11:23 AM Go to last post
  12. Random variable

    Suppose that we have a very large collection of marbles, 30% of which are red, 20% of which are green, 40% of which are blue, and 10% of which are...

    Started by DeerPark‎, 12-08-2010 12:33 PM
    • Replies: 2
    • Views: 3,993
    12-09-2010, 11:41 AM Go to last post
  13. Marbles ()

    Suppose that we have a very large collection of marbles, 30% of which are red, 20% of which are green, 40% of which are blue, and 10% of which are...

    Started by DeerPark‎, 12-10-2010 01:28 PM
    • Replies: 0
    • Views: 1,995
    12-10-2010, 01:28 PM Go to last post
  14. Probability WTF??

    I am really having trouble with this problem. I need to know what the probability is if a number lies between two numbers. Using the Z-score table. ...

    Started by deflp4‎, 11-04-2009 08:06 PM
    • Replies: 2
    • Views: 3,082
    11-04-2009, 08:18 PM Go to last post
  15. Difference between mean and expected value

    Could someone please explain as simply as possible the difference between mean and expected value? Here is my problem: This is for my math stats...

    Started by defrost‎, 12-06-2013 09:58 PM
    • Replies: 2
    • Views: 4,672
    12-07-2013, 11:06 AM Go to last post
  16. Probability difficulties and Z scores

    I am currently grappling with this question: In a certain study the average age was 34.79 years. The SD of age was 14.78. What probability do...

    Started by Deganveran‎, 02-27-2010 05:36 PM
    • Replies: 4
    • Views: 3,840
    02-28-2010, 04:52 PM Go to last post
  17. probability of 'wrong-direction' pair

    Hello! I have two normal distributions N1, N2 with means m1, m2 and standard deviations s1, s2. Let's say that m1 < m2. If I draw one observation...

    Started by dej76‎, 07-20-2008 11:02 AM
    • Replies: 3
    • Views: 2,280
    07-23-2008, 07:47 PM Go to last post
  18. Help about Isserlis’ theorem

    The Isserlis theorem states that if is a zero mean multivariate normal random vector, then : E = EE + EE + EE Now, in the case x,y,z,t are...

    Started by DejanM‎, 01-30-2012 12:38 PM
    • Replies: 0
    • Views: 63,274
    01-30-2012, 12:38 PM Go to last post
  19. Normal probability question (tough one I think)

    What is the probability that a randomly selected sample mean of n=100 will be greater than a randomly selected sample mean of n=1000? I'm not sure...

    Started by Delacroix‎, 06-27-2008 11:25 AM
    • Replies: 2
    • Views: 2,342
    06-27-2008, 01:33 PM Go to last post
  20. Unhappy Hypothesis Testing with proportions

    Calculate and interpret the Z-scores to test significant difference between the proportion of rates of dementia between a. 30-49 year-old US men...

    Started by delaney‎, 04-07-2016 04:30 PM
    • Replies: 0
    • Views: 1,232
    04-07-2016, 04:30 PM Go to last post
  21. Probability Question

    I have a short paper due on probability. Here's the info: First, we assume that Alex Rodriguez has four at bats and that the at bats are...

    Started by delilah86‎, 03-04-2008 08:33 PM
    • Replies: 0
    • Views: 1,907
    03-04-2008, 08:33 PM Go to last post
  22. Binary string probability question

    Hi, I'm having trouble figuring out this question. I am quite new to probability at this point. Q: How many binary strings of length 2n have...

    Started by delive‎, 05-24-2009 04:21 PM
    • Replies: 1
    • Views: 3,447
    05-25-2009, 06:08 AM Go to last post
  23. joint probability questions help?

    You were given the following joint probability function for Y1 = { 0, if the child survived, 1, if not, and Y2 = { 0 if no belt used, 1 if adult...

    Started by demarkus‎, 09-14-2011 07:14 PM
    • Replies: 0
    • Views: 3,322
    09-14-2011, 07:14 PM Go to last post
  24. Post Unit Root

    What's this about? I'm new to econometrics and i'm trying to understand this conceptually. I know it has to do with nonstationarity (mean, variance...

    Started by Demgo‎, 02-09-2011 06:14 PM
    nonstationarity, random walk, stationarity, unit root, white noise
    • Replies: 0
    • Views: 3,528
    02-09-2011, 06:14 PM Go to last post
  25. 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: 7,557
    11-30-2005, 04:49 PM Go to last post
  26. Probability/Stats help

    I wasn't sure what forum to post this is in, its for stats class but it ask for probabilities. A survey measured numbers of hours per month spend...

    Started by denimchicken‎, 03-09-2011 12:13 AM
    • Replies: 1
    • Views: 2,227
    03-09-2011, 01:32 AM Go to last post
  27. Lightbulb Conditional probability

    Hello, I'm having an issue with a problem. I just have no clue how to solve it. A machine part may be selected from any of three manufacturers...

    Started by dennissse‎, 01-16-2016 11:16 AM
    conditional, engineering, machine, probability, statistics
    • Replies: 2
    • Views: 1,912
    01-16-2016, 10:21 PM Go to last post
  28. Fixing the low value and high value in a probabilistic simulation

    Hi, When doing repeated random sampling in a monte carlo method, is there a defined procedure to fixing the low value and high value of the...

    Started by depakroshanblu‎, 02-20-2017 08:58 AM
    • Replies: 10
    • Views: 2,661
    02-23-2017, 03:33 PM Go to last post
  29. Proving of probability

    Hello! I'm new to this site, so I hope this is the right category to post my question. So here's the deal: in class we get almost only theory, very...

    Started by depressor‎, 11-12-2012 02:06 PM
    • Replies: 4
    • Views: 1,471
    11-12-2012, 04:25 PM Go to last post
  30. Question Stuck with a (i think) simple problem

    Hi everybody, I have a question here that I'm completely brain frozen with.. (I'm not the youngest anymore, and I can't seem to wrap my brain around...

    Started by derBrain‎, 02-04-2015 04:31 PM
    • Replies: 5
    • Views: 1,864
    02-05-2015, 01:39 PM Go to last post
  31. What's wrong with this sample space?

    "A coin is tossed until for the first time the same result appears twice in succession. Describe the sample space." My answer: \Omega :=...

    Started by derksheng‎, 08-07-2012 10:30 AM
    • Replies: 6
    • Views: 2,439
    08-07-2012, 01:08 PM Go to last post
  32. Difficult probability question

    I've gotten this off another forum (it hasn't been solved yet), and thought you guys might enjoy this problem. I don't need it solved as it's not my...

    Started by derksheng‎, 08-08-2012 11:35 PM
    • Replies: 7
    • Views: 1,894
    08-09-2012, 10:20 AM Go to last post
  33. Probability and Sampling Distribution Question

    Just before a city referendum on a school budget, a local newspaper polls 400 voters in an attempt to predict whether the budget will pass. Suppose...

    Started by deron.washington‎, 03-25-2008 10:38 PM
    • Replies: 2
    • Views: 5,752
    03-31-2008, 06:36 PM Go to last post
  34. Normal Distribution & possible Standard Deviation error

    I have collected final sales data for over 12,000 sales of a single particular item. The prices range from $0.01 to a little over $4.00. I calculate...

    Started by derreckn‎, 02-18-2011 04:19 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 8,606
    02-23-2011, 09:10 AM Go to last post
  35. Help finding a multivariable probability density function?

    I'm working on a mathematical modeling problem, where the following diagram will aid my description: http://bnware.ndforums.com/dr_dia.png A...

    Started by deseraimp‎, 11-10-2012 01:10 PM
    density, function, multivariable, probability
    • Replies: 1
    • Views: 997
    11-11-2012, 12:55 PM Go to last post
  36. Binomial Formula ?

    Hi everyone, I'm absolutely going crazy trying to figure this problem out, and I know the answer LOL..I just can't figure out how they got it. Using...

    Started by desmoface‎, 10-18-2008 11:54 AM
    • Replies: 12
    • Views: 3,586
    10-19-2008, 10:25 PM Go to last post
  37. Application of conditional probability with three variables

    I have a question concerning the following problem: A hunter has a double-barrelled shotgun. The probability that at least one shot hits the...

    Started by desy‎, 05-09-2014 04:45 PM
    bayesian formula, conditional probabilty
    • Replies: 0
    • Views: 2,166
    05-09-2014, 04:45 PM Go to last post
  38. Urgent help needed - what is the probability that a student owns both a car and cell?

    Hi, I am taking an introductory STAT course at UMN. I can't for the love of anything figure out the probability. Here's the question: Suppose...

    Started by Deusdies‎, 12-18-2011 02:51 PM
    • Replies: 1
    • Views: 1,530
    12-18-2011, 03:17 PM Go to last post
  39. Independent events occurring simultaneously

    Hey guys, I saw a similar question on the site, but still need some help with my own. Here it is: Consider a double computer intruder detection...

    Started by deutscherhoff‎, 10-13-2012 11:55 PM
    alarm, events, independent, intruder, simultaneous
    • Replies: 2
    • Views: 2,743
    10-14-2012, 02:32 PM Go to last post
  40. Correlation coeficient(X,rank(X))

    Given a sample of size N from a standard normal, I'd like to compute the correlation coeficient(X,rank(X)). So I need the expected value fo X*F(X)......

    Started by Devanil‎, 04-07-2013 08:13 PM
    • Replies: 3
    • Views: 1,954
    04-09-2013, 05:09 PM Go to last post
  41. Combination and Permutation question

    Hi guys, I'm new to the field of probability and statistics, I have a question that I can't seem to be able to solve, it would be a great help if you...

    Started by devick‎, 11-16-2014 07:57 AM
    • Replies: 2
    • Views: 1,460
    11-20-2014, 11:03 PM Go to last post
  42. Red face Normal Approximation probability question

    Consider a four-sided die loaded so that 1 shows 40% of the time. If we roll this die 50,1000,2000,4000,8000 times, find the probability in each...

    Started by devimon‎, 11-26-2012 07:51 PM
    four-sided loaded die, normal approximation, probability
    • Replies: 1
    • Views: 2,144
    11-27-2012, 02:52 AM Go to last post
  43. Lightbulb Normal Approximation question

    1) A fair coin is tossed 600 times. What is the probability that the number of heads will be between 290 and 310? (I have the answer, but I need...

    Started by devimon‎, 11-26-2012 02:24 AM
    coin toss, heads, normal approximation, probability
    • Replies: 1
    • Views: 1,204
    11-26-2012, 04:01 AM Go to last post
  44. Probability question!(help on solving!)

    A group of 5 co-workers, Tim, Harry, Nina, Brad and Pam contributed to buy a raffle tickets. They won a set of three tickets to an upcoming concert....

    Started by Devin‎, 09-22-2012 06:32 PM
    • Replies: 1
    • Views: 1,426
    09-22-2012, 06:45 PM Go to last post
  45. Binomial distribution variace q

    Given a scenario where there is a true statistic - proportion voting yes in a vote denoted by p ,we sample people from the large population, n . ...

    Started by devlin‎, 09-06-2010 04:24 PM
    • Replies: 0
    • Views: 2,222
    09-06-2010, 04:24 PM Go to last post
  46. probability question

    how do i find the mean and standard deviation? Let the random variable x represent the number of girls in a family of three children. I...

    Started by Dewdrop731‎, 03-04-2008 07:46 PM
    • Replies: 0
    • Views: 1,650
    03-04-2008, 07:46 PM Go to last post
  47. Asynchronis Particle Counting

    I have particles incident on a detector at 1000 events/sec. My detector is turning on and off at 1000 e/s bu only for 10% of the time, asynchronis to...

    Started by dfperrault‎, 02-14-2013 05:27 PM
    • Replies: 0
    • Views: 1,018
    02-14-2013, 05:27 PM Go to last post
  48. Special Continuous Distributions

    I am NOT asking for answers!! Let me make that clear... I'm only asking for help in the method as to solving problems such as these. I missed my...

    Started by dgbula‎, 11-03-2010 03:31 PM
    • Replies: 3
    • Views: 5,484
    11-03-2010, 06:55 PM Go to last post
  49. Question about probability - roulette wheel

    Hi there, Have a question about the topic above. I spin a roulette wheel and wait until 31 of the 37 numbers have come up. I then cover the...

    Started by dhanwell‎, 02-09-2010 10:49 AM
    • Replies: 6
    • Views: 5,204
    02-09-2010, 01:23 PM Go to last post
  50. Probability Question

    An ice cream company makes ice cream bars on sticks which sell for 10 cents. Suppose that the company puts a star on every 50th stick; anyone who...

    Started by dharjai‎, 11-14-2016 08:37 AM
    • Replies: 1
    • Views: 2,652
    11-14-2016, 08:47 AM Go to last post
  51. Umpa Lumpa Backstory ~ Flipping Coins for $$$.

    10,000 Umpa Lumpas, are flipping coins in a football stadium. (yes, from Willy Wonka fame, I figured they're tireless workers and enjoy mundane...

    Started by DHass22‎, 08-21-2013 12:15 AM
    bell curve, coin toss, martingale, regression to the mean, streak theory
    • Replies: 3
    • Views: 2,240
    08-21-2013, 09:40 AM Go to last post
  52. a short one

    Hi guys, I'm new to this forum, and perhaps there already exist an answer to this question. Anyway here I go, I have an assignment in...

    Started by dhl‎, 02-07-2009 01:45 PM
    • Replies: 5
    • Views: 2,423
    02-09-2009, 08:01 PM Go to last post
  53. Convergence of random variables

    Hi guys, I have two questions that I don't really know how to approach. 1. Consider a random variable Zn = max (1<= k <= n) Xk where Xk is...

    Started by Dibbs‎, 09-28-2010 07:56 AM
    • Replies: 1
    • Views: 1,987
    09-28-2010, 10:36 AM Go to last post
  54. Integrations by part - Expected Value

    Hi guys, I need to prove that E = int - int Any starting points ? Thank you!

    Started by Dibbs‎, 09-29-2010 11:31 PM
    • Replies: 1
    • Views: 2,844
    09-30-2010, 05:00 AM Go to last post
  55. Need help with geometric pmf

    Hi all, Here's the problem: Let X be the number of accidents per week in a factory. Let the probability mass function of X be f(x) = 1/(x+1) -...

    Started by Dichotomous‎, 09-22-2014 11:34 AM
    • Replies: 2
    • Views: 2,709
    09-22-2014, 01:26 PM Go to last post
  56. How to find probability in this statistics problem?

    We have "N" experiments with YES/NO outcome and in each experiment probability for YES is "p". If in "N-1" experiments we had "m" YES outcomes,...

    Started by dicki767‎, 12-13-2010 12:05 PM
    • Replies: 4
    • Views: 3,378
    12-14-2010, 12:20 PM Go to last post
  57. Learning Probability via a Tutorial Dialogue

    Hi, I have set up a web-site on learning basic probability via tutorial dialogues. After an initial quiz, a talking head ("Dr. Brown") will...

    Started by Dietmar‎, 04-26-2007 06:26 AM
    • Replies: 0
    • Views: 2,697
    04-26-2007, 06:26 AM Go to last post
  58. Mum's doubt...

    Hi, I need some help for my mum... Here's it: How can you calculate k, knowning that X~N(a,b) and P(X>k)=c with c>0.5? :confused: I know that...

    Started by dilasluis‎, 06-25-2006 02:56 PM
    • Replies: 0
    • Views: 2,161
    06-25-2006, 02:56 PM Go to last post
  59. Same flat tire

    Hello, I am unsure about how to solve this one: It's Friday afternoon and six fraternity brothers at UNC have just attended their last class of the...

    Started by dina786‎, 10-01-2012 06:08 PM
    • Replies: 7
    • Views: 4,614
    02-26-2014, 12:24 AM Go to last post
  60. Finding probability of left and right handed people

    Hello, I am lost on these problems: Assume that 13% of people are left-handed. If we select 10 people at random, answer the following questions: ...

    Started by dina786‎, 10-01-2012 06:14 PM
    • Replies: 11
    • Views: 9,084
    10-02-2012, 10:29 AM Go to last post

+ Post New Thread
Page 20 of 91 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 70 ... LastLast

Thread Display Options

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats