1. Announcement:
05-10-2017
Views:
1,871
Page 75 of 91 First ... 25 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 Last
Threads 4441 to 4500 of 5451

# 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: 30,307
09-30-2005, 09:44 AM
1. ### Probabilty of picking higher number

I am working on a webbased game, and need help with some probability. Player A rolls a 20 sided die with the numbers 1 through 20. Player B rolls...

• Replies: 12
• Views: 3,545
08-28-2008, 12:02 AM
2. ### Need to find the distribution function

I have a probability function, and I would need the distribution for it, so I can calculate confidence intervalls. A nominal variable X can take R...

• Replies: 2
• Views: 2,794
08-27-2008, 03:13 AM
3. ### Area under the sampling distribution curve

Hi, Given a random sample size of n=10 (from a normal population) and a standard deviation of 5, how can I calculate the area under the sampling...

• Replies: 2
• Views: 4,622
08-25-2008, 04:11 PM
4. ### Poll

I have made a poll and I sent it to 10 people. 8 sent me it back and 6 made me some comments. I analyse that 3 say that they like RED. What can...

• Replies: 2
• Views: 2,223
08-23-2008, 09:47 AM
5. ### discrete approximation of continuous probabilty

not sure how to state this, but... assume I want to randomly generate some discrete numbers in the range 1...k but i want them to be generated...

• Replies: 4
• Views: 3,766
08-21-2008, 03:59 PM
6. ### cost estimating with probability

i'm trying to do a quick cost estimation using this monte carlo program to see how it works but i'm also trying to factor in different types of risk...

• Replies: 0
• Views: 4,087
08-19-2008, 05:14 PM

Just a little background if you can please bear with me. I live in Japan. I retired and am now living a pretty boring life. That is until I...

• Replies: 1
• Views: 1,957
08-18-2008, 02:42 AM
8. ### Analyzing a difference in conditional probabilities

Hi all, I would like to compare the conditional probabilities of an animal behaving in a certain way at two different treatment types. Say the...

• Replies: 4
• Views: 2,647
08-14-2008, 12:33 PM
9. ### Interesting Probability Issue Here

Hi folks, I have an interesting probability question that has come up in a real life situation, and I'd like to pose it to you. My company is...

• Replies: 1
• Views: 1,968
08-14-2008, 02:00 AM
10. ### probability concepts

Hi, In Devore and Farnum (Applied Statistics and Scientists and Engineers), it gives this question on p. 210: "Suppose that there is a...

• Replies: 6
• Views: 3,529
08-13-2008, 07:16 PM

Hi everyone, I have an exam on Friday and I just cant seem to get me head on how to answer a probability question, And because I don’t fully...

• Replies: 2
• Views: 2,350
08-13-2008, 03:48 PM
12. ### autoregressive

hi folks, i am using 2nd order autoregressive for prediction. my equation is y(t)=b1 + b2*y(t-1) + b3*y(t-2). i found the coefficients b1,...

• Replies: 3
• Views: 1,896
08-13-2008, 11:14 AM
13. ### Mice in a maze probability puzzle

I’ve got a probability puzzle I am trying to solve and was hoping somebody could help. It comes from some chemistry experiments I’m doing, and not...

• Replies: 2
• Views: 4,960
08-13-2008, 10:51 AM
14. ### Just a tiny bit of assistance

Among U.S. households, 24&#37; have telephone answering machines. If a telemarketing campaign involves 2,500 households, find the probability that more...

• Replies: 1
• Views: 2,281
08-12-2008, 09:30 PM
15. ### two questions for "poisson process"

Hi: I have 2 questions regarding the poisson process... 1) Let{N(t), t>=0} be a poisson process of rate 1. Evaluate E( N(3) | N(2),N(1) ) ...

• Replies: 1
• Views: 2,008
08-11-2008, 05:11 AM
16. ### Method for Bayes spam filtering

I am trying to understand the method for Bayesian spam filtering given here http://en.wikipedia.org/wiki/Bayesian_spam_filtering It makes sense...

• Replies: 0
• Views: 1,700
08-10-2008, 04:35 PM
17. ### Statistical significance for discrete data?

I'm getting myself in a muddle and hoping someone can help! I am analysing a discrete data set - I am comparing my control and experimental group,...

• Replies: 0
• Views: 2,441
08-09-2008, 09:28 AM
18. ### Dummy variables and regression

Hi there, I am using Y (with 6 categories) as an independent variable. In order to regress this variable with a dependent variable (Z), I had to...

• Replies: 1
• Views: 3,983
08-08-2008, 03:40 AM
19. ### moment generating function

Hi I have a question here: Let X be N(µ, Σ) obtain its moment generating function anyone know how to do it?? it really confused me !! ...

• Replies: 1
• Views: 2,928
08-08-2008, 01:08 AM
20. ### Luck vs. Skill Question

Hi, I am reading the book "Fooled By Randomness" by Nassim Nicholas Taleb and ran into what I think is a statistics/probability question. In the book...

• Replies: 1
• Views: 3,061
08-07-2008, 02:06 PM
21. ### Estimating Sports Statistics

I need some help with football application. I have a set of quarterback statistics projections for an entire season (16 games), including the players...

• Replies: 2
• Views: 2,711
08-07-2008, 01:56 PM
22. ### Poisson/Binomial distribution help

Hi everyone I'm enrolled in a first year intro stats paper at uni and am having difficulty solving questions on proportions using binomial or...

• Replies: 6
• Views: 3,637
08-06-2008, 04:59 PM
23. ### Movement in Consumer Choice / Markov Chain??

I'm trying to determine a way to model the choice behavior of a group of individuals whose choices are based on a 5-point scale (i.e. they can select...

• Replies: 1
• Views: 2,370
08-06-2008, 04:03 PM
24. ### Is there enough information here to solve this problem?

I'm not sure if I should be posting this under statistics or probability, but here's the problem: Jan did a survey of the students in her class in...

• Replies: 3
• Views: 2,780
08-06-2008, 12:40 PM
25. ### Probability that 53% of College Students graduate in 5 years or less

Good Afternoon, I am working on a problem and got stuck. The problem is below: It is estimated that approximatly 53% of College Students graduate...

• Replies: 2
• Views: 4,061
08-05-2008, 06:46 PM
26. ### p-value to compare agreement between 2 methods

I have 2 methods which, given a list of variables, put these variables into an order. So imagine I have 20 possible variables,...

• Replies: 2
• Views: 4,927
08-04-2008, 12:51 PM
27. ### finding value of z0

P(|z| > z0) = 0.10 Find z0. I think the answer is z0 = 1.28, however I'm not sure how to get that. The first time I did it, I got 1.645,...

• Replies: 1
• Views: 23,588
08-04-2008, 11:55 AM
28. ### Bayes Theorem application

Prior probabilities if diseases are based on the physician’s assessment of factors such as geographic location, seasonal influences, and occurrence...

• Replies: 1
• Views: 4,952
08-03-2008, 12:55 PM
29. ### Joint/Marginal PDF question

OK, I have this problem on my hw I am struggling through. Random vector (X,Y) has the joint pdf f(x,y) = c(x^2+y^2), for x^2+y^2<1, and = 0...

• Replies: 1
• Views: 4,785
07-31-2008, 04:33 PM
30. ### I think this is binomial???

I was wondering if anyone can solve this problem and let me know how they did it. I am thinking this is a binomial problem, but I haven't been able...

• Replies: 2
• Views: 2,685
07-30-2008, 09:34 PM
31. ### Conditional Probability

I was hoping someone could shine some light on how to go about solving this question.... A dog has a litter of four pups. Assume, as usual, that...

• Replies: 1
• Views: 2,100
07-27-2008, 03:18 PM
32. ### An Unusual Probability Question

Hello everyone, I wonder if anyone would be willing to help me in deciding whether an unusual array of numbers I've found within the NIV Bible is...

• Replies: 0
• Views: 2,954
07-24-2008, 09:44 AM
33. ### 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...

• Replies: 3
• Views: 2,270
07-23-2008, 07:47 PM
34. ### Stats question.

Part 1. In how many ways can a television director schedule a sponsor's six different commercials during the six time slots allocated to commercials...

• Replies: 1
• Views: 3,094
07-23-2008, 07:37 PM

A teenager is mugged in the city centre for his expensive, size 9, trainers by a white man. A white suspect from the same city is arrested wearing a...

• Replies: 0
• Views: 2,031
07-23-2008, 10:27 AM
36. ### What is the process spread ?

Here's the question: Fifty measurements were taken to determine the weights of filled ice cream containers. The average of these measurements is...

• Replies: 2
• Views: 11,816
07-23-2008, 07:12 AM
37. ### P- value

Hi. Could a p-value be 5.7597? It seems too big!!!

• Replies: 1
• Views: 2,681
07-21-2008, 10:45 PM
38. ### Help with coins!!!

Hi.. I don't know how to get started. Here is my problem: A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of...

• Replies: 2
• Views: 3,278
07-21-2008, 09:22 PM
39. ### How to solve this problem?

HI, i get stuck on this problem, any1 knows how to solve it??? Horizontal lines y = n (n = 0, +-1,...) are drawn in R^2. A needle of length 1 is...

• Replies: 1
• Views: 2,458
07-20-2008, 10:38 AM
40. ### Need help in finding the probability of events occuring?

Question: i have a total of 16 events whereby the probability of 2 events occuring is 0.3, the probability of 6 events occuring is 0.003 and the...

• Replies: 6
• Views: 5,523
07-20-2008, 01:38 AM
41. ### Problem help needed

Does anyone know how to solve the following problem: i)Toss a coin until the nth H comes up. Let Y=#of required tosses. Calculate P(Y is even)....

• Replies: 0
• Views: 1,753
07-19-2008, 05:52 PM
42. ### Confidense interval for population standard deviation

Here is one I am stuck on...not even sure where to begin. Oh, and it is due in 19 hours ;-) A bank is attempting to improve the perceived customer...

• Replies: 2
• Views: 3,869
07-18-2008, 02:24 PM
43. ### Comparing conditional probabilities?

I have 250 respondents. They’ve reported their participation in three different kinds of political activities: reading about politics on line,...

• Replies: 2
• Views: 2,881
07-17-2008, 08:22 PM
44. ### Need Help Understanding Independence

Unfortunately, I am having trouble understanding independence. Can anyone explain independence to me in dummy terms?

• Replies: 2
• Views: 3,371
07-17-2008, 04:08 AM
45. ### Help with finding indicated probability

I have worked on this problem now for the whole entire day, and still don't understand what I am doing wrong. Can someone help me? The problem...

• Replies: 4
• Views: 29,052
07-13-2008, 06:04 PM
46. ### Probability of Amino Acid Sequence

I need to predict the frequency of a certain chain of amino acids occurring by chance. Sequence: N - X - S (where X is any amino acid) So far...

• Replies: 2
• Views: 2,936
07-11-2008, 08:41 AM
47. ### Comparing CDFs using Chi squared?

HI, I have a set of data from which I can construct the cumulative distribution function. I then compare this contructed CDF with the CDFs of a...

• Replies: 3
• Views: 4,632
07-10-2008, 07:44 AM
48. ### Sample mean and variance of dependent random variables

The sample mean and variance of independent random variables are mean = E(X) variance = Var(X)/n What if the random variables are dependent? ...

• Replies: 1
• Views: 13,447
07-10-2008, 03:57 AM
49. ### probability of exceedence

Hi all, I'm new here, but I have a problem I can't figure out. I have wave height data from the past 13 years and I fitted the data with a...

• Replies: 0
• Views: 3,111
07-07-2008, 09:42 AM
50. ### probabilities

I am german and I have some difficulties understanding some terms. I have a homework in reference to probabilities. Please help me with the formula....

• Replies: 3
• Views: 2,707
07-06-2008, 06:02 PM
51. ### Can increased promiscuity decrease STD risk? Part I.

My brother mentioned a book he had read and enjoyed. In it, a chapter was devoted to the idea that "More 'Secks' is Safer 'Secks'". An abridged...

• Replies: 0
• Views: 2,842
07-04-2008, 01:04 PM
52. ### Need help

I have little idea of probability. I am programming a tool in C where I use random 64 bit numbers. Many people call rand() function of C library four...

• Replies: 3
• Views: 2,277
07-03-2008, 03:30 AM
53. ### Probability - Multiplication/addition rules?

I have been working on this problem and have come up with answers, but I have a feeling they are wrong...Hoping people much more intelligent in...

• Replies: 6
• Views: 4,733
07-01-2008, 11:16 PM
54. ### nonstandard normal distributions

I am working a problem regarding IQ scores and am having trouble with one of the problems. I've got it figured out how to work other problems but...

• Replies: 5
• Views: 21,177
07-01-2008, 10:15 PM
55. ### Probability Problems! Help! Thanks

Recently bar codes put on retail products were changed so that they would represent 14 digits instead of 12. How many different products can now be...

• Replies: 1
• Views: 3,505
07-01-2008, 07:44 AM
56. ### 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: 3,253
06-30-2008, 09:03 PM
57. ### Defects

I would like to see how I can solve this problem effectively. Thanks for your help in advance. x= no of defects P(x) = prob of defects x ...

• Replies: 1
• Views: 2,296
06-30-2008, 03:49 PM
58. ### 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...

• Replies: 2
• Views: 2,319
06-27-2008, 01:33 PM
59. ### Sampling to figure most common color in M&M packet

Please disregard this post. I did not realize that my earlier post was moved over to the Stats section.

• Replies: 0
• Views: 3,469
06-27-2008, 12:55 PM

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.