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# Forum: Probability

Probability course and homework discussion. Probability distributions. Probability theory, stochastic processes

1. ### 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)...

• Replies: 0
• Views: 30,199
09-30-2005, 09:44 AM
1. ### Bayesian probability question about Dirichlet prior distributions

Hi there, I have a question about Bayesian probability. I have a list of the starting times of journeys. I binned the data into 15 minute...

• Replies: 2
• Views: 1,688
10-16-2012, 03:38 AM
2. ### Bayesian serial chain

I am trying to understand Bayesian networks and particularly causal (serial) chains. It is defined as P(C|A&B) = P(C|B).This means that the...

• Replies: 0
• Views: 1,424
01-23-2016, 01:06 PM
3. ### Bayesian Statistics

A logistic regression model for a binary outcome Y given x is given by P(Y=1) = exp(a +bx)/(1+exp(a+bx)) Assume a prior distribution f(a,b)...

• Replies: 3
• Views: 1,865
11-29-2011, 02:44 PM
4. ### bayesian statistics

I have a large amount of data, given totals for every hour over a year period for the following columns: # of Jams Jam event time in minutes # of...

• Replies: 0
• Views: 1,230
12-01-2015, 01:23 PM
5. ### Bayesian updating over multiple distributions

Say I believe a basketball player's likelihood distribution of making a shot is affected by his distance from the hoop, how well he is being...

• Replies: 14
• Views: 3,198
01-22-2012, 04:00 PM
6. ### Bayesian vs. Frequentist

Hi, I am a college student who has taken a course in frequentist probility learned a little bit of Bayesian probability. I don't know enough to...

• Replies: 8
• Views: 4,457
07-03-2012, 03:43 PM
7. ### Beating the odds

The mortality tables give person 'A' 5 more years to live. He/she dies after 7. The tables give a person more years to live the longer that...

• Replies: 0
• Views: 1,816
11-07-2011, 12:47 PM
8. ### Beauty Shop problem

Alice and Betty enter a beauty parlor simultaneously, Alice to get a manicure and Betty to get a haircut. Suppose the time for a manicure(haircut) is...

• Replies: 0
• Views: 3,946
03-22-2009, 02:13 PM
9. ### Beginner for Probability

I'm taking a statistics class that's covering probability. I'm having problems with some of my homework. I was hoping somebody could tell me what...

• Replies: 0
• Views: 3,236
06-30-2008, 09:03 PM
10. ### Beginner help with unconscious statistician

I should really know this, but i get stuck at some differentiation. So X is a R.V. with p.d.f. f_x(x), and Y=aX+b. We want to find f_y(y). So i...

• Replies: 2
• Views: 1,831
03-30-2013, 04:41 PM
11. ### Beginning and end of rainy season. How to?

Hi all, This is a beginner's question, I apologize for that. I have taken Descriptive Statistics and I am on my why to Probability and later...

• Replies: 2
• Views: 1,405
11-08-2014, 12:54 PM
12. ### Beginning Bayes problem

I'm getting about every other question right, and since the back of the book only has answers, not whole solutions, I can't tell what I'm doing...

• Replies: 1
• Views: 11,621
09-27-2006, 06:24 PM
13. ### Bejeweled Combos

Hi all, Many of you I assume are familiar with Bejeweled, a puzzle game in which the player swaps neighboring, colored gems in an 8 x 8 grid to...

• Replies: 2
• Views: 4,033
07-16-2010, 12:08 PM
14. ### Benford's Law and U.S. States

Can Benford's law apply to the population of the 50 U.S. states? Is the sample size adequate to make this work? If so, what does it show? Curious...

• Replies: 1
• Views: 2,928
02-13-2010, 12:00 AM
15. ### Bernoulli / Geometric Distribution Question

This is a question that is on a study-guide for a test I have coming up, and I'm completely lost. I was sick when we covered Bernoulli's experiments...

• Replies: 1
• Views: 4,554
11-17-2010, 01:15 AM
16. ### Bernoulli distribution and PGF

let Yi,j be independent Bernoulli random variables with E = 1/j. Let Zj = sumYi,j for i=1 to j . Let MZj(s) be the probability generating function...

• Replies: 6
• Views: 2,314
02-12-2015, 01:37 PM
17. ### Bernoulli Random variable and population problems - i need it for an exam

Let Ya and Yb denote Bernoulli random variables from 2 different populations, denoted a and b. suppose that E (Ya)= Pa and E (Yb) = Pb. A random...

• Replies: 1
• Views: 3,721
09-22-2012, 03:34 PM
18. ### Bernoulli Trials

Background: I play a game in which a lot of things are determined by random events. Many things work like simple Bernoulli trials (you make an...

• Replies: 1
• Views: 1,912
03-14-2013, 03:14 PM
19. ### best ebook for daily life probability problems

Hi, can any one tell me please best ebook for daily life problems of probability.I have done a search but not found yet...

• Replies: 4
• Views: 1,549
01-20-2014, 04:14 PM
20. ### best forecast

hi, i have been solving this question and my result is different than the results i have been given to compare to. can u please tell me if i am...

• Replies: 1
• Views: 3,212
BGM
01-27-2010, 08:53 AM
21. ### Best To Draw First Or Last?

Hi, newbie non mathematician looking for an answer to a long debated question in angling. When fishing a competition we draw a random number (say...

• Replies: 5
• Views: 1,963
01-20-2016, 01:46 PM
22. ### Best unbiased estimator of a function of a estimator

Hi, I'm having a small problem with the following problem: From the factorization theorem I know that \max{X_i}=X_{(n)} is a sufficient...

• Replies: 2
• Views: 1,735
07-15-2013, 10:29 AM
23. ### beta-binomial for repeated discriminative test

Hi everybody. I need advice on repeated discriminative test. It is a similarity test, i.e. I am interested in determinig that two items are...

• Replies: 0
• Views: 2,685
02-06-2008, 10:59 PM
24. ### bias coin density question

if the density function of a bias coin is x-x^2 between 0-1. and z=0 is probability of bias coin fall on tail, z=1 is on its head, then whats...

• Replies: 2
• Views: 1,732
11-13-2013, 08:29 PM
25. ### 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...

• Replies: 0
• Views: 2,295
03-05-2012, 12:29 AM
26. ### Bias, Unbias, and MSE

Hello everyone! I am new here, this is my first post so I hope this is the right area to post this in rather than the statistics section. ...

• Replies: 0
• Views: 1,120
02-25-2013, 09:52 PM
27. ### Biased Coin and Conditional Probability

Here's another question that I'm trying to work the kinks out of. Consider a biased coin with the probability of getting heads being p. The coin...

• Replies: 1
• Views: 8,496
10-04-2009, 06:53 PM
28. ### bidding probability

Hi. I am not overly familiar with statistics. I am preparing a manuscript and I need a formula to determine probability. Here is the problem. ...

• Replies: 0
• Views: 2,826
03-14-2011, 02:45 PM
29. ### 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...

• Replies: 4
• Views: 18,924
02-14-2006, 12:26 PM
30. ### Bimonial aggregation

Hi, I'll try to keep this brief. I'm having troubles working with the binomial for a sporting event. Here's a totally simplified and fictional...

• Replies: 5
• Views: 2,008
04-12-2012, 09:05 AM
31. ### Binary Bootstrap

Is it valid to use a bootstrap technique for estimating variance in a binary (yes/no or 1/0) data set? My motivation for doing so is to perform...

• Replies: 5
• Views: 7,380
09-29-2009, 04:01 AM
32. ### Binary Logistic Regression Event Prob - Minitab

Good Day To All, I am new to the site and could use a little clarification regarding the following: In Minitab, I have conducted a Step-Wise...

• Replies: 1
• Views: 4,179
06-25-2010, 03:00 PM
33. ### binary sequence statistics

Hi all, I have a problem. Supose a random sequence: 011000101010101_? I want to find the probability of next number comes 0 or 1. So i want to...

• Replies: 0
• Views: 1,186
11-15-2013, 09:48 AM
34. ### 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...

• Replies: 1
• Views: 3,420
05-25-2009, 06:08 AM
35. ### Bingo probability question

Hello all, I have visited the wizzard of odds to get some answers on bingo probabilities but I have a new version that isn't included on that...

• Replies: 0
• Views: 3,362
06-02-2010, 03:53 AM
36. ### Binomail question

Can you tell me what I'm doing wrong? If I'm rolling exactly 2 threes in 5 rolls of a fair die, would I not: n!/k! (n-k)! and this would be...

• Replies: 2
• Views: 2,370
12-04-2006, 04:15 PM
37. ### Binomial

The proportion of individuals who favor Party A in the population is 55%. How large must a sample be in order to ensure that 99% of the sample favors...

• Replies: 5
• Views: 2,965
02-19-2009, 05:40 PM
38. ### Binomial

machine has 3 wheels each with 40different numbers, the problem need to find the probabilty of have 3 apples in the case where 1) 3 times in...

• Replies: 14
• Views: 2,805
12-07-2011, 07:02 AM
39. ### Binomial + Binomial

Hi, I'm having difficulty working with the binomial - specifically aggregating binomial distributions. Hoping somebody can tell me where I'm...

• Replies: 0
• Views: 923
04-11-2012, 02:41 PM
40. ### Binomial and exponential distribution?

Hi everyone. Could you help me with these two following problems: 1. A machine normally makes items of which 4% are defective. Every hour, the...

• Replies: 1
• Views: 5,216
01-25-2011, 04:32 AM
41. ### binomial distribuion problem

Estimate the indicted probability by using the normal distribution as an approximation to the binomial distribution. In one county, the conviction...

• Replies: 0
• Views: 4,541
05-14-2009, 04:53 AM
42. ### Binomial Distribution

I am struggling with statistics (now, there's a first!) I am working in binomial distribution and trying to determine probability of rolling a...

• Replies: 2
• Views: 3,082
04-26-2006, 11:03 PM
43. ### Binomial distribution

Can someone explain to me why for a binomial distribution you can't analyze an event that is changing over time?

• Replies: 1
• Views: 2,308
08-02-2006, 09:50 AM
44. ### binomial distribution

A "thinking" question I need help with regarding binomial distributions and I have no clue what they mean. Please help!! I can do the problems O.K....

• Replies: 0
• Views: 3,786
12-29-2007, 10:36 PM
45. ### Binomial Distribution

I just want someone to please verify whether my approach to this problem is correct. The question goes as follows; Use a binomial distribution to...

• Replies: 1
• Views: 2,328
04-14-2008, 07:15 PM
46. ### Binomial Distribution

Hello everyone, I have the following probability problem and I do not how to do it. A person claims that she is a fortunate teller. She...

• Replies: 0
• Views: 2,016
02-24-2009, 06:34 PM
47. ### binomial distribution

If every person tossed a coin 5 times, what is the probability of observing 5 tails if there are 1000 people? i can work out the answer if only...

• Replies: 1
• Views: 2,900
01-10-2010, 03:49 PM
48. ### 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...

• Replies: 9
• Views: 11,845
03-05-2012, 07:24 PM
49. ### Binomial Distribution

A company starts a fund of M dollars from which it pays \$1000 to each employee who achieves high performance during the year. The probability of...

• Replies: 3
• Views: 5,689
02-08-2014, 02:10 PM
50. ### Binomial distribution ! Need help!

Hi, plz tell me if method to solve these question is correct or not! q)In a call centre 180 calls are received at random over a period of 12...

• Replies: 0
• Views: 4,224
06-28-2014, 11:05 AM
51. ### Binomial Distribution - Help

• Replies: 2
• Views: 917
02-14-2014, 01:10 AM
52. ### Binomial Distribution / Consecutive Odds Question

Hi everyone, Looking to solve a 3 part problem. My answers to the first 2 parts agrees with the textbook answers, but I'm confused by the 3rd...

• Replies: 0
• Views: 5,427
07-18-2013, 06:18 PM
53. ### Binomial Distribution Analysis Question

Hi everyone. I have a couple of questions and would greatly appreciate it if you could help me out! First, I'll provide some information: ...

• Replies: 4
• Views: 11,573
07-07-2012, 12:07 PM
54. ### Binomial distribution and rolling dice

I realized this was the homework forum and reposted it in general discussion since mine is not homework.

• Replies: 0
• Views: 1,062
06-17-2016, 03:26 PM
55. ### Binomial Distribution as N goes to Infinity

I know that the Central Limit Theorem says that all types of distributions go to normal distribution as N goes to infinity. However, is there some...

• Replies: 6
• Views: 9,126
07-15-2010, 07:36 PM
56. ### Binomial distribution confusion.

Hello all. I am having a bit of confusion taking the conditional expectation of a binomial cumulative distribution. Lets say the probability of a...

• Replies: 1
• Views: 2,991
BGM
07-27-2010, 03:03 AM
57. ### binomial distribution help

hey i just need some help with this question: im confused about the formula. find sigma and mu A)the probability distribution of the # of tails...

• Replies: 1
• Views: 3,748
05-06-2009, 11:51 PM
58. ### Binomial Distribution help

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of...

• Replies: 2
• Views: 8,456
BGM
12-12-2010, 02:03 PM
59. ### binomial distribution help / confirmation

Q: A manufacturer produces 1000 computer chips for a mission-critical application. Each chip costs \$100 to manufacture and sells for \$2000, but has...

• Replies: 1
• Views: 3,011
09-29-2013, 05:01 PM

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