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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: 30,330
09-30-2005, 09:44 AM
1. ### Probability

Question : Jane wants to do her MSc in statistics. She appliesa to two universities. Assume the acceptance rate at University A is 25% and at...

• Replies: 4
• Views: 4,449
10-15-2006, 05:57 AM
2. ### Probability Question

A mortgage company knows that 8% of its loan recipients default within the first five years. To be profitable the company must have no more than 25...

• Replies: 4
• Views: 3,283
04-20-2006, 08:52 PM
3. ### mathematical expectation

A despondent math professor is traveling to Las Vegas to bet his entire life savings, \$20,000, on one roll of the (two) dice. If the total is 7 or...

• Replies: 4
• Views: 4,788
04-27-2006, 10:47 AM
4. ### still having difficulty after reading previous threads

Regarding Question #2 In grading apples into "A","B" and "C" a large orchard uses weights to distinguish apples. Any apple weighing more than...

• Replies: 4
• Views: 3,479
02-15-2006, 02:29 PM
5. ### This is not homework. Just for entertainment.

My gaming clan was having a dispute over some voting procedures and I posed a question for them to answer. If they get it right I would donate an...

• Replies: 4
• Views: 3,063
02-27-2006, 07:57 AM

I am stuck on the following question for my coursework. A factory produces metal rods. One project requires that the rods are 60 + or - 0.2 cm...

• Replies: 4
• Views: 2,147
03-12-2006, 07:33 PM
7. ### Help on probability

Probability of 12 defects in one batch = 0.3060 If two more batches are produced, find the probability that all 3 batches will contain at least 12...

• Replies: 4
• Views: 2,693
04-05-2006, 10:01 AM
8. ### I never knew calculating probability was so difficult!

I'm having a really hard time wrapping my mind around these questions! I think I might be thinking of this too simplistically. If someone could...

• Replies: 4
• Views: 3,203
04-12-2006, 08:36 AM
9. ### Permutations

I'm having trouble with this one: In how many different was can the letters of the word "BLUEBERRY" be arranged? I got 7,560? Is that what...

• Replies: 4
• Views: 3,457
04-25-2006, 02:12 PM
10. ### Pair multiple dice

Help I have developed a mental block, and despite searching I cannot find any information about how the following works. My problem is...

• Replies: 4
• Views: 4,176
06-17-2006, 11:04 PM
11. ### identifying the distribution of a data set

Dear all I am creating a software that is reading tcp packets from a link. I have the following information available: size of the packet: ...

• Replies: 4
• Views: 5,250
08-16-2006, 10:58 PM
12. ### Newbie Really Needing Help

I am having a problem with one of my assignments for my class, and for the life of me, I cannot solve it. Any help would be much appreciated! Here...

• Replies: 4
• Views: 2,460
08-29-2006, 09:35 PM
13. ### Need Help Please

There is a group of 200 college students, 138 are taking psychology, 115 are taking sociology, and 91 are taking both. a.) How many of the...

• Replies: 4
• Views: 5,344
09-10-2006, 10:48 PM
14. ### Probability Question

I am having problems with this problem. What forumula would I use, and how would I do this problem. A product has five ways in which it might...

• Replies: 4
• Views: 2,214
09-19-2006, 09:25 AM
15. ### p(x)=0, even though x can occur !

For a continuous distribution: p(x)=0, even though x can occur. I can understand this statement, since I can imagine that there is an infinite number...

• Replies: 4
• Views: 2,916
09-24-2006, 10:39 AM
16. ### probability

what is hypergeometric experiment?

• Replies: 4
• Views: 2,519
09-24-2006, 09:38 AM
17. ### Coin A Coin B

Coin A is flipped 3 times and coin B 4 times. What is the probability that the number of tails obtained from flipping the 2 fair coins is the same?

• Replies: 4
• Views: 2,760
10-11-2006, 11:11 AM
18. ### probability confusion

Hello everyone!!! I don't know if im experiencing a brain-fart these days, but I just can't figure this out. Here's a problem. I have more like...

• Replies: 4
• Views: 4,716
10-31-2006, 10:34 PM
19. ### Assesing normality - Amateur question

Hi everybody, (First of all, excuse my poor english : It's not my native tong). I'm working for myself on a computer programm which will deal...

• Replies: 4
• Views: 4,147
01-21-2008, 11:11 AM
20. ### question about probability

Imagine that I have a bag filled with 200 milions of small balls of different colors (each color has the same number of balls). Furthermore, a ball...

• Replies: 4
• Views: 2,853
11-13-2006, 06:42 AM
21. ### I'm very confused...(Normal Distribution)

Hi people...I really should of come here sooner to try and ask for help, but I just kept letting myself sink deeper and deeper... Now I have some...

• Replies: 4
• Views: 3,183
11-21-2006, 11:14 PM
22. ### 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: 3,152
01-17-2007, 12:39 PM
23. ### 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: 4,210
01-28-2007, 01:57 PM
24. ### help

A random sample of selected from a normal population

• Replies: 4
• Views: 2,924
04-19-2007, 04:23 PM
25. ### probability of consumption

could someone let me know what i'm doing wrong? A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet...

• Replies: 4
• Views: 24,492
06-13-2007, 11:06 AM
26. ### Finding the probability, given only the mean

Hello, I am in desperate need for assistance. A tutee of mine had a problem with probability. Here is the question: According to J. D. Powers...

• Replies: 4
• Views: 6,119
06-13-2007, 02:22 PM

Hi, I've been working on an extra credit problem, which seems pretty easy but I can't figure it out. It's only 2 points, but any help would be...

• Replies: 4
• Views: 2,857
06-28-2007, 01:42 AM
28. ### How to approximate a non-standard pdf?

Hi All, I've got a bit of a techincal question here that I would greatly appreciate some guidance on. Although I have some experience with...

• Replies: 4
• Views: 3,518
07-25-2007, 11:49 AM
29. ### Desperately needing homework help!

I tried the math lab at the local college and the statistics professor was as stumped as I was! A videotape has an average of one defect every...

• Replies: 4
• Views: 4,801
07-30-2007, 04:02 PM
30. ### Conjunction of n hypothesis

Ciao all, :wave: I have a conjunction of n non-independant hypothesis: h1 and h2 and .... and hn. I want to calculate the probability of...

• Replies: 4
• Views: 3,569
09-16-2007, 09:38 AM
31. ### Convergence in probability

Hi, Can you please help me with the following question? Any hints, ideas would be much appreciated. Suppose that the sequence Xn converges to...

• Replies: 4
• Views: 4,954
09-26-2007, 09:29 AM
32. ### Scrabble probability question?

I have a question for you probability and statistics experts out there. At the beginning of scrabble to determine who starts, each person (in this...

• Replies: 4
• Views: 9,145
12-21-2007, 04:22 PM
33. ### variance of probabilities

A variance is the amount of spread in a distribution, right? I keep coming up with a huge number for the variance and I'm not sure if this number...

• Replies: 4
• Views: 3,741
06-13-2008, 01:39 AM
34. ### Some questions on Hypothesis, poissson and normal dist...try it

Question 1 Millions of suburban commuters are finding railroads to be a convenient, time-saving, less stressful alternative to the automobile. While...

• Replies: 4
• Views: 4,085
03-03-2008, 01:53 PM
35. ### Probability Problem Question

Hello all, I'm struggling quite mightily with this one problem (embarrassing to me once you see how simple it is). I've been trying to figure it...

• Replies: 4
• Views: 2,484
02-21-2008, 06:00 PM
36. ### Probability Problem

Hi all, I have been trying to come up with the correct answer for part c) of this question with no luck. A gumball dispenser has 38 orange...

• Replies: 4
• Views: 5,672
02-22-2008, 04:09 PM
37. ### 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: 2,155
03-10-2008, 08:51 AM
38. ### Four-Sided Die Question

Consider the trial on which a 4 is first observed in successive rolls of a four-sided die. Let A be the event that 4 is observed on the first trial....

• Replies: 4
• Views: 5,011
05-05-2008, 01:12 PM
39. ### Elevator probability question

This morning, when I walked into the elevator, I had this question in my mind. Five people walk into an elevator at Ground level. There are 17...

• Replies: 4
• Views: 8,012
04-18-2008, 02:27 PM
40. ### chess probability question

Hello, This question is taken from Ross' a first course in probability chapter 2. It is question 17. Here it is: If 8 rooks are randomly...

• Replies: 4
• Views: 8,706
05-06-2008, 12:28 PM
41. ### quadtrat counts

hi, maybe someone can help with the following problem: i counted quadrat of a grid with or without incidents. the grid covered a periphery area...

• Replies: 4
• Views: 2,768
05-14-2008, 03:43 AM
42. ### Golf Probability Again

This problem is really bothering me cause I can't figure it out at all...so I'm gonna try reposting it if that's ok: Harry is an employee at a...

• Replies: 4
• Views: 1,987
06-02-2008, 03:44 PM
43. ### 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: 29,075
07-13-2008, 06:04 PM
44. ### 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: 2,648
08-14-2008, 12:33 PM
45. ### 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: 3,772
08-21-2008, 03:59 PM
46. ### Joint distribution of noncentral t statistics

Hi, I need to compute a probability which is described by the joint distibution of 2 non-central t statistics. If somemody knows references...

• Replies: 4
• Views: 2,470
09-03-2008, 10:30 AM
47. ### Poisson with events per week for calculating probability per Quarter?

Hi all, I have a question regarding the Poisson distribution. (I searched the forum before creating this post, I couldn't find a similar post) ...

• Replies: 4
• Views: 5,205
09-05-2008, 11:31 AM
48. ### please check

X) How many different eleven-letter words (not necessairly pronounceable or meaningful) can be made from the letters in the word MISSISSIPPI? ANS:...

• Replies: 4
• Views: 2,424
09-20-2008, 12:20 PM
49. ### independence

p(a) = 0.1 and p(b) = 0.3 : assume these events are independent 1) prob of neither events occuring? I got 0.97 2) prob of at least one event...

• Replies: 4
• Views: 2,899
09-22-2008, 10:04 AM
50. ### Rolling a pair of dice.

http://www.cam.cornell.edu/~sharad/math407/midterm_sol.pdf I don't understand 3b. Why isn't the E1 union with E2 just sum of E1 and E2? I think...

• Replies: 4
• Views: 3,013
09-30-2008, 10:25 AM
51. ### Probability Distribution

Hello: A novice statistician here. Hopefully someone can help me with what I expect is an easy question. I'm trying to create a probability...

• Replies: 4
• Views: 2,529
kgs
10-28-2008, 01:12 PM
52. ### Transformations of Random Variables

Suppose X ~ U(-1,2). find the density of X^2 My soln so far: f(x)x = (1/3, -1<x<2. 0 elsewhere) My teacher tells us to find the CDF, then...

• Replies: 4
• Views: 2,813
10-12-2008, 05:06 PM
53. ### Infinite sum

Hi All- It has been a few years since my last calc class and now I am taking a course in mathematical stats. I have the discrete data pmf:...

• Replies: 4
• Views: 3,112
10-12-2008, 02:06 PM
54. ### risk

Hi, sorry if may be a stupid question, but I have a such an elementary doubt: let you suppose that a certain distribution (for example triangular:...

• Replies: 4
• Views: 2,520
10-18-2008, 12:50 PM
55. ### How to apply a distribution and derive a failure rate?

please excuse me for my newbie question. certain factors influence the power requirements for my system which comprises of several components. i...

• Replies: 4
• Views: 4,956
10-27-2008, 01:18 PM
56. ### Not a problem, but an opinion about a book

I am currently taking a class called Probability/Math Statistics I. We are using a book called Probability and Statistics with Applications. It is...

• Replies: 4
• Views: 2,102
11-01-2008, 10:39 AM
57. ### Can anybody help me with this probability question?

helpneeeded

• Replies: 4
• Views: 2,309
11-06-2008, 02:24 AM

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