1. Announcement:
05-10-2017
Views:
1,782
Page 91 of 91 First ... 41 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
Threads 5401 to 5449 of 5449

# 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: 30,190
09-30-2005, 09:44 AM

I am trying to finish my thesis for my Masters in Civil Engineering and have run into a statistics/ probability question which my one Engineering...

• Replies: 6
• Views: 2,739
02-05-2009, 06:45 PM
2. ### Will two Independent Variables transformed into two functions remain independent?

X & Y are independent variables. X ~ Bernoulli(1/2), Y ~ Bernoulli(1/3). Let Z = X + Y and W = X - Y. Compute Cov(Z,W) and Corr(Z,W). Am I...

• Replies: 16
• Views: 3,028
10-07-2012, 11:36 PM
3. ### win money

A man won money when he bet unsuspecting patrons that in 4 rolls of a die, he could get at least one six, but he lost money when he bet that in 24...

• Replies: 1
• Views: 2,048
10-05-2006, 06:47 AM
4. ### wishart distribution and correlation matrix???

hey there everyone! just a quick question.... you see how the sampling distribution of the covariance matrix follows a wishart distribution (for...

• Replies: 7
• Views: 8,937
Lep
09-16-2013, 03:01 AM
5. ### Word problem needs double checking.

There are 10 seniors, 8 juniors, 5 sophomores and 3 frshman on student council. A committee of 6 members is formed. a.p(all seniors) b.p(3...

• Replies: 2
• Views: 1,463
05-10-2013, 02:16 PM
6. ### word problems

Here are a few more questions that I got wrong and need help figuring out if anyone could help. Question 1: The length of time for students to...

• Replies: 3
• Views: 4,042
05-19-2006, 12:21 PM
7. ### Working out probability for this game

Rather confusing game ive started playing in the streets. I've been making alot of money from a game called high dice. A 6 sided dice is rolled...

• Replies: 2
• Views: 1,602
12-31-2011, 10:05 PM
8. ### World Cup - a simple probability question

Hi All I hope this is not considered too far outside the purpose or spirit of this site! I haven't touched statistics since doing A level...

• Replies: 2
• Views: 2,546
06-21-2006, 10:50 AM
9. ### Would love some assistance with understanding this puzzling probability "game"

Hello everyone, This is my first post here, so please be gentle :). I'd like to thank everyone in advance for any help that can be given. ...

• Replies: 3
• Views: 1,601
07-05-2014, 06:18 PM
10. ### would some one confirm my answers

1-Many universities require a student to take a math placement test as well as computer science placement test.80% of the students who take both...

• Replies: 2
• Views: 2,079
03-01-2008, 05:06 PM
11. ### Writing a book - need help!

I am writing a book on double deck pinochle and need to get accurate percentages. I am hoping this forum is willing and able to help me! If I am in...

• Replies: 8
• Views: 3,929
BGM
08-05-2010, 12:21 AM
12. ### X + a log X, where X~Gamma

Does anybody know anything about the distribution of X + a log X, where X is a gamma distributed random variable and a is constant?

• Replies: 7
• Views: 3,919
02-09-2009, 12:45 PM
13. ### X and Y is independent. I didn't say that X and Y is conditional independent given Z.

X and Y is independent. (Note that I didn't say that X and Y is conditional independent given Z.) Still pr(X|Z) * pr(Y|Z) = pr(XY|Z) is always...

• Replies: 1
• Views: 2,311
BGM
04-25-2012, 02:34 AM
14. ### X=0 almost surely => E(X)=0

Axioms of expectation: 1. X>0 => E(X)>0 2. E(1)=1 3. E(aX+bY) = aE(X) + bE(Y) 4. If X_n is a nondecreasing sequence of numbers and lim(X_n) = X,...

• Replies: 14
• Views: 4,513
07-20-2009, 12:59 AM
15. ### Xn~Exponential(.5) -> Xn~Normal. Use Chebychev's inequality

Xn are iid Exponential(.5). After using the central limit theorem, Xn is Normally distributed. Use chebychev's inequality to find out how large n be...

• Replies: 6
• Views: 2,254
10-20-2012, 03:01 PM
16. ### y follows a Poisson distribution with rate lambda*x

Assume that the number of faults in the roll, say y, follows a Poisson distribution with rate lambda*x, where x is the length of the roll. Does this...

• Replies: 4
• Views: 6,346
12-05-2010, 05:27 PM
17. ### Yet (another) derivation from linear mixed effects regression...

hello there... first of all, thank you very much to everyone who has replied to my questions and has helped me understand these things a little bit...

• Replies: 3
• Views: 2,022
09-28-2011, 08:07 PM
18. ### Yet another "flipping" coin problem

Hi folks, So we flip two balanced coins. If at least one of them shows tails what is the probability that the other coin is also tails? My answer:...

• Replies: 4
• Views: 3,497
04-12-2011, 08:15 PM
19. ### Yet more problems!!!

OK. Like I said. I am really struggling with this. Here are two more I can't grasp. 1. You are fishing at a Reservoir. The Department of...

• Replies: 0
• Views: 2,071
04-15-2006, 07:08 PM

There are two boxes, Box A and Box B. • Box A contains seven $1 tags, six$5 tags, four $10 tags, two$15 tags, and one $20 tag. • Box B contains... • Replies: 0 • Views: 1,756 06-06-2008, 09:05 AM 21. ### z and standard normal variable... I have a question on my homework...I'm not looking for the answer, just how to find it... If Z is a standard normal variable how would you find the... • Replies: 1 • Views: 3,289 12-10-2007, 02:49 PM 22. ### Z score question Hello there was wondering if someone could help shed some light on this question for me..any help would be greatly appreciated.. The mean height... • Replies: 3 • Views: 3,520 09-03-2006, 08:52 AM 23. ### Z scores .. please help there is two problems that i can answer .. 1) Processing of the ceramic alloy involves a sintering ( firing ) process which produces a dense hard... • Replies: 4 • Views: 3,066 01-06-2010, 02:00 PM 24. ### Z Scores Probabilty...Can anyone help? Hey, Here is the question, I need some serious help!!!! A soft drink machine can be regulated so that it discharges and average of µ per cup. If... • Replies: 4 • Views: 2,140 03-10-2008, 08:51 AM 25. ### z standard normal First part of the question asks..if X is normal with mean = 8.48 and sd = 1.6, what are the 2 values of X which include central 80% of probability? ... • Replies: 1 • Views: 5,426 04-11-2008, 07:18 AM 26. ### Z Table Lookup Question I have the following practice question: P(-3.80<z<-2.40) Why is the answer .0081? How do I find that? • Replies: 2 • Views: 3,038 09-02-2006, 06:00 PM 27. ### Z tables Can someone tell me what Z upper and Z lower values are? I am trying to find theoretical parts out of spec. The specifications are -.30 to .30 with... • Replies: 5 • Views: 6,664 01-12-2006, 12:31 PM 28. ### Z test Hi , i have a question regarding z test and testing at 5% level. If sample size is 60 S=11.7 X=42.8 and i use formula Z= X-mu ... • Replies: 3 • Views: 1,896 el1 04-22-2008, 07:06 PM 29. ### Z-score from a negative x value Hello, I am trying to calculate the z-score for a normal random variable(x), which has a negative value. I know the formula. If x < 3.4 the mu... • Replies: 1 • Views: 2,522 BGM 11-19-2013, 08:58 PM 30. ### Z-scores & Central Limit Theory I have been trying to work on my stats for a right long time now. I can't figue out this one question in my textbook. I don't understand or even know... • Replies: 1 • Views: 6,729 11-05-2010, 08:04 PM 31. ### Z-scores for probability in tails I haven't done any stats in years and now I am in a course for my grad program and I am so lost. My teacher is very confusing and I am trying my best... • Replies: 3 • Views: 23,888 10-16-2008, 06:45 AM 32. ### z-test for a proportion Please help... Lets say that I have developed a new method and software prototype that aims to significantly reduce the ambiguity inherent in... • Replies: 1 • Views: 4,088 05-29-2008, 07:40 AM 33. ### Z-values and probability Suppose concentration of arsenic (in ppb) in groundwater sampled quarterly from a particular well can be modeled with a normal distribution with a... • Replies: 0 • Views: 1,313 03-09-2014, 07:30 PM 34. ### zero inflated poisson distribution I am new and I hope I'm abiding to the rules. I just wanted to know what exactly a zero inflated Poisson distribution is? How is it related to the... • Replies: 2 • Views: 6,378 03-16-2010, 09:21 AM 35. ### zmoggggg -- Continuation of Poisson question, please verify and advise ok so lambada value here =4 (Average of 240 planes in 1 hr) and for the following question a) atleast 1 plane arrives during the 10-minute... • Replies: 2 • Views: 2,158 11-06-2008, 01:50 PM 36. ### Ztable probability, Please Help Im looking back over an old assignment and I cant figure out how to get the correct probability Question: what is the probability of encountering... • Replies: 3 • Views: 2,250 10-26-2008, 02:37 PM 37. ### [ASK] Combination: Am I Doing This Right? Among 10 candidates of Students Council members, 3 people will be selected to undergo training. The number of possible ways to do so if 1 candidate... • Replies: 2 • Views: 1,491 02-17-2015, 10:06 PM 38. ### [ASK] Combination? 5. A bag contains 7 red marbles and 5 yellow marbles. From the bag, 3 marbles are taken randomly at once. How many ways exist if all 3 taken marbles... • Replies: 0 • Views: 1,018 03-10-2015, 09:56 PM 39. ### [ASK] Doctrine of Chances by Abraham de Moivre Doctrine of Chance is a book published by Abraham de Moivre in 1718. It was on the sbuject of probability containing many innovations such as method... • Replies: 0 • Views: 1,624 01-09-2015, 10:29 PM 40. ### [Discrete Probability Function] P(X²=1)= P(X=1) U P(X=-1)? I would like to know if this following form of interpretation is correct: ========================== Suppose I have a discrete probability... • Replies: 1 • Views: 1,040 04-18-2017, 09:18 AM 41. ### [Gamma Distribution] Generate random number according to Gamma Distribution Hi, I request your help / suggestion to solve the following problem Suppose X_i, i=1,2,...,n are exponential RVs with mean 1/k. If the triggering... • Replies: 3 • Views: 2,167 BGM 10-25-2012, 03:54 AM 42. ### [Homework help] Binomial distribution questions After the BP oil crisis in the Gulf, sixty percent of Americans are in favor of the government’s moratorium on deepwater oil drilling. Out of the... • Replies: 9 • Views: 4,162 09-03-2010, 04:47 PM 43. ### [Likelihood of embedded Markov chain] Likelihood of Goldman Yang (GY) rate matrix This question concerns defining the likelihood of a set of parameters in a rate matrix of an embedded Markov chain. To get a brief idea of the... • Replies: 0 • Views: 1,426 12-17-2012, 11:52 AM 44. ### [Question] "Supermatch" cards problem Dear everyone, I have a question that i couldn't figure out clearly. Here is it. Here will i write down what i have been done, and please... • Replies: 1 • Views: 2,316 BGM 10-25-2011, 02:07 AM 45. ### [Question] Birthday Problem Here is the problem, I already get the answer, \frac{r}{365 -365(\frac{364}{365})^s} What do you think? • Replies: 1 • Views: 2,431 10-26-2011, 12:04 PM 46. ### [URGENT] TrickY problem about conditional probability 1) Consumer in a supermarket, 20% buy 10 items or less, 70% spend more than$ 10, and 68% spend less than 10 dollars and buy more than 10 items. what...

• Replies: 2
• Views: 3,621
11-09-2010, 04:34 PM

Page 91 of 91 First ... 41 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

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.

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