1. Announcement:
05-10-2017
Views:
1,901
Page 83 of 91 First ... 33 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 4921 to 4980 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: 30,353
09-30-2005, 09:44 AM
1. ### Mom and Daughter Birthdates

Hi to you all from the UK (Anglesey, Nth Wales) My friend Cathi and her daughter Manon were born on the same date and also the same time (Feb...

• Replies: 5
• Views: 3,160
05-23-2007, 03:46 PM
2. ### everything in life has a probablity of 50-50

take a minute to think about this: everything in life has a probability of 50-50. it either happenes or it doesn't. I have never inderstood why...

• Replies: 3
• Views: 4,694
05-23-2007, 03:38 PM
3. ### Previously Posted Question

I am trying to view the attachments that are connected to this previous thread. Can anyone help. http://www.talkstats.com/showthread.php?t=1301 ...

• Replies: 1
• Views: 2,559
05-21-2007, 02:38 AM
4. ### Desperate

It would be greatly appreciated if I could get some help with the following question. The probability of incurring an insurance claim loss of...

• Replies: 2
• Views: 3,384
05-20-2007, 08:09 PM
5. ### Urgent Help needed. Thanks in advance.

Join Date: May 2007 Posts: 1 kellan is on a distinguished road Help needed on problem, URGENT! Thanks in advance. I'm stuck on figuring otu...

• Replies: 1
• Views: 3,464
05-19-2007, 12:51 AM
6. ### a random number generator problem

Hello all, I have to resolve the next type of problem: I have a machine that is supposed to generate truely random 0/1 values. If i'm testing...

• Replies: 1
• Views: 3,405
05-19-2007, 12:07 AM
7. ### "Fair Game" problem

Hello, I'm new here. I joined in the hope that someone would be able to help me with this problem: --- Players A and B play a fair game for \$20:...

• Replies: 1
• Views: 3,557
05-18-2007, 12:54 PM
8. ### Poker and the law...

Recently, a bill was signed in Indiana that classified poker (and all other card games ) a game of 'chance' and therefore illegal to play for money. ...

• Replies: 0
• Views: 2,114
05-16-2007, 12:10 PM
9. ### Its been a while since I opened a stats book

I run a business that uses phone numbers (without country code) to identify customers. We currently run in a country that uses 8 digit phone numbers...

• Replies: 1
• Views: 2,578
05-14-2007, 04:16 AM
10. ### deriving expected value of negative binomial distribution

Hey all, I've derived the expected value of the binomial distribution, but I can't seem to figure it out for the negative binomial distribution....

• Replies: 0
• Views: 11,777
05-13-2007, 07:50 PM
11. ### Newbie stuck with problem...

I am horrible at math and can't seem to grasp this at all... A local bank reports that 70% of it's customers maintain a chequing account, 50% have a...

• Replies: 1
• Views: 3,033
05-06-2007, 10:58 AM
12. ### How to get this Z value?

P<=.667 Z.667 = .432 My question is how to get .432 by using the cumulative normal probability table(z-values). Thanks for your help,...

• Replies: 1
• Views: 2,292
05-05-2007, 03:16 PM
13. ### Intro to Probability

This IS a homework question, but if anyone feels they might lend me some advice, I would greatly appreciate it. University received 2851...

• Replies: 0
• Views: 3,470
05-03-2007, 11:42 AM
14. ### an interesting Bayesian stat question

Suppose a random sample of size n is from uniform distribution U(0, exp(gamma)), suppose the prior distribution of gamma is N(a, b), how to find the...

• Replies: 1
• Views: 1,966
05-02-2007, 11:21 AM
15. ### URGENT help needed

A company are searching for 5 oil wells in a landscape the sucess rate of finding a hole is 10% (0.1) for each hole therefore failure must be 90%...

• Replies: 1
• Views: 2,045
05-02-2007, 09:50 AM
16. ### Introduction to Statistics question

Hello All, I have a question on my study guide that says A random sample of 64 observations produced the following summary statistics: sample...

• Replies: 1
• Views: 3,873
04-30-2007, 08:17 AM
17. ### Normal Distribution

Please help me if possible The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it...

• Replies: 2
• Views: 3,447
04-29-2007, 06:14 PM
18. ### confidence level

if i have a sample group of 148, and a response rate of 17%, what is my confidence level with the data?!

• Replies: 0
• Views: 3,076
04-29-2007, 03:05 PM
19. ### 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...

• Replies: 0
• Views: 2,694
04-26-2007, 06:26 AM
20. ### Help!

I need help with this problem: a wildlife biologist examines frogs for a genetic trait he suspects may be linked to sensitivity to industry toxins...

• Replies: 2
• Views: 4,765
04-26-2007, 12:27 AM
21. ### Is the following relationship true?

This came from a paper I was reading. I tried to figure out how the authors reached their results and concluded that the following formula must be...

• Replies: 2
• Views: 2,369
04-25-2007, 08:37 AM
22. ### Point me in the right direction plz!

I need help with the second part of this problem: It turns out that the number of Pepsis John has in a week is normally distributed with mean 2.5...

• Replies: 0
• Views: 2,351
04-25-2007, 02:05 AM
23. ### Probability Problem

I need some help with this probability problem. On any given day, Jen will sell 85% of her baked goods. For a sample of 500 potential customers,...

• Replies: 1
• Views: 5,157
04-24-2007, 01:15 AM
24. ### Need help plz

Here is the problem I am stuck on...it's easy, I just can't seem to figure it out for some reason: In a class, the grades are normally...

• Replies: 1
• Views: 2,025
04-24-2007, 01:06 AM
25. ### Silly baseball question.

I know I'm new, but it's not really my intention to just jump on here and post something and then never post again, honestly I don't know why I...

• Replies: 2
• Views: 5,880
04-22-2007, 08:57 PM
26. ### Probability problem and 2 others

Ok I have 3 problems and I cant figure them out :mad: its driving me crazy. 1. The number of calls coming into a PBX follows a Poisson process...

• Replies: 5
• Views: 5,551
04-19-2007, 05:31 PM
27. ### help

A random sample of selected from a normal population

• Replies: 4
• Views: 2,926
04-19-2007, 04:23 PM
28. ### help

for df=15 find the value(s) of t associated with each of the following a) the top 5 % of the distribution b) the middle 95 % verus the extreme...

• Replies: 0
• Views: 1,947
04-17-2007, 04:14 PM
29. ### prob question

I have a 3 part question and I think i've got the first 2 parts but i'm stuck on third. it's: there is a cabin that has a probability of.05 of being...

• Replies: 1
• Views: 2,186
04-17-2007, 07:42 AM
30. ### Probability and time

Hi This is not a homework question, alas school and university are many years ago for me; but I was wondering how you account for time when using...

• Replies: 0
• Views: 2,180
04-14-2007, 06:59 PM
31. ### Distributions

Hello there, Finally got the hang of the this from by using my Excel. Although, I would love to do by the formula method. Im not sure what...

• Replies: 1
• Views: 2,898
02-06-2007, 07:45 AM
32. ### Easy problem, has me stumped, addition rule?

This has me stumped, possibly because the notes i took did not make sense to me, I may have it right, and if not, please correct me :] In a pop....

• Replies: 2
• Views: 2,639
02-05-2007, 11:05 PM
33. ### Sample correlation

Im in desperate need and im stuck: Can someone plsease tell me where im going wrong with this question. Calculate the sample correlation between...

• Replies: 2
• Views: 2,427
02-05-2007, 12:28 PM
34. ### Crazy union/intersection question.

Paul will be taking three exams - call them A, B and C. You are given: -It is certain that he will pass at least one exam. -The probability that...

• Replies: 1
• Views: 2,866
02-05-2007, 12:17 PM
35. ### Question about use of Poisson probabilities

I work for a firm that compiles a database of license plate numbers, some of which correspond to cars that flunk roadside emissions testing. We ...

• Replies: 0
• Views: 2,622
02-03-2007, 08:45 PM
36. ### Conditional Probability

I have been working on this problem for two hours and i can't seem to get it right! 28 crayons, 4 are red. they are divided among 4 people evenly....

• Replies: 0
• Views: 1,826
02-02-2007, 03:13 PM
37. ### Conditional probability...

------- Jose and Jim go duck hunting together. Suppose that Jose hits the target with a probability 0.3 and Jim, independently, with a probability...

• Replies: 1
• Views: 3,686
01-31-2007, 06:17 PM
38. ### A probability/stat elementary problem

Hi, I am currently reviewing probabilities on my own and encountered problems which i can't seem to do. Hopefully someone here will be kind enough to...

• Replies: 2
• Views: 4,496
01-31-2007, 01:54 PM
39. ### Permutation Problem - help me understand pls!

I am reading this example about permutation and can't understand how to go about rationalize it. Example: Suppose that 2 anthropology, 4 computer...

• Replies: 1
• Views: 5,928
01-31-2007, 06:17 AM
40. ### Poisson/Binomial - Conclusions Based on a Small Sample

Any help with the problem below is greatly appreciated. :wave: I have 100 days of observations of a geyser. In those 100 days, the geyser shot...

• Replies: 2
• Views: 3,574
01-30-2007, 10:10 PM
41. ### Gambling Theory / Martingale

Is anyone here familiar with gambling theory? If so, is the Martingale system a viable betting strategy where P(w) > .5, say .5061. Does anyone...

• Replies: 0
• Views: 1,975
01-28-2007, 09:31 PM
42. ### probaliblity question

a producer of a fruit drink advertises it contains 10% real fruit juices. A sample of 75 bottles are analyzed and it's found that only 6.6% is real...

• Replies: 1
• Views: 2,262
01-28-2007, 04:27 PM
43. ### Weighted sums of random variables

In an effort to determine the expected return of two stocks (A and B), I'm instructed in my homework to use the formula Y=a(subscript)1 X(sub)1 +...

• Replies: 1
• Views: 3,258
01-28-2007, 04:03 PM
44. ### Complements, Unions, and Intersections

Help!:shakehead In a market research survey participants were asked if they put ketchup directly on their fries or along side. 26% of men said...

• Replies: 4
• Views: 4,215
01-28-2007, 01:57 PM
45. ### need help with a handful of question

Hello.. I just found this site and I was wondering if you guys could help me. I've never been very good at stats and I've been working on questions...

• Replies: 3
• Views: 2,577
01-28-2007, 11:48 AM
46. ### Probability

I have been working on this problem for a couple of hours. :confused: From a survey of Americans, it was found that 65% of the respondents do not...

• Replies: 2
• Views: 2,302
01-28-2007, 11:30 AM
47. ### Multiple normal distributions

Post removed.

• Replies: 0
• Views: 2,782
bcs
01-26-2007, 07:04 PM
48. ### Probability

Two Questions 1. Number of units sold 0 1 2 3 4 5 Probabiltiy of units .1 .15 .2 .35 ...

• Replies: 2
• Views: 3,196
01-25-2007, 10:52 AM
49. ### Hypergeometric Probablility

I have a question here, bit of an old one and there have been a lot of examples about it before but I couldn't find any solutions. Its goes as such:...

• Replies: 0
• Views: 3,317
01-21-2007, 12:52 PM
50. ### Conditional Probability

Hello, i am a tad confuzzled with conditional probability. I have a question i am half way through and i have hit a brick wall. It is given that:...

• Replies: 3
• Views: 3,345
01-20-2007, 09:44 AM
51. ### Normal Curve

Calculate the standard score of the given X value, X=61.6 where mu=66.7 and standard deviation is 65.2 I got a negative score of .078, that can't...

• Replies: 1
• Views: 4,252
01-19-2007, 10:08 PM
52. ### Joint probability

Hi, I have this problem I can't think of any way to solve this. A recent survey examined the working arrangements of married households. It was...

• Replies: 0
• Views: 3,111
01-17-2007, 06:47 PM
53. ### Roulette Question

I am really stuggling with this....please help The game of American Roulette is played on a whele which consists of 38 slots, each with its...

• Replies: 4
• Views: 3,160
01-17-2007, 12:39 PM

Hello, I'm having a lot of trouble with this problem, and it doesn't seem like it should be difficult. A bowl contains 20 cherries, exactly 15...

• Replies: 1
• Views: 3,160
01-17-2007, 12:31 AM
55. ### help with simple (i think) probability problem

Given two possible outcomes with different probabilities (say, a 10% chance I will break my leg if I jump off the roof and a 90% chance that I will...

• Replies: 1
• Views: 2,648
01-15-2007, 12:43 AM
56. ### help with simple probability problem

see other thread - couldn't find how to delete this message - sorry

• Replies: 0
• Views: 1,982
01-13-2007, 05:55 PM
57. ### Help with these probability problems

1. Conditional Prob: Approximately 1/125 of all births are fraternal twins and 1/300 of births are identical twins. Elvis Presley had a twin brother...

• Replies: 1
• Views: 6,388
01-13-2007, 12:58 PM
58. ### Normal Distribution question

Help help i have a test on monday and i know nothing!!! I am doing these questions and i have stumbled upon a pickle... The heights of girls of a...

• Replies: 3
• Views: 2,691
01-13-2007, 08:47 AM

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.