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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: 30,221
09-30-2005, 09:44 AM
1. ### Quantum Methods - Probability

Hey yall, I'm taking a Quantum Methods class (Business Statistics) for my degree. Although I have taken Stats before, it was a year ago and I'm...

• Replies: 1
• Views: 2,510
10-20-2007, 02:14 AM
2. ### Generating function

Hi, I'm stuck on this problem. If anyone could help, it would be really appreciated! Find the generating function for the negative binomial...

• Replies: 0
• Views: 2,446
10-19-2007, 08:21 PM
3. ### Probabilities. Is this correct?

In a study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual. Suppose that...

• Replies: 0
• Views: 4,704
10-19-2007, 07:07 AM
4. ### Probability P(A|B)

Ralph and Melissa watch lots of videos. But they have noticed that they don't agree very often. In fact, Ralph only likes about 10% of the movies...

• Replies: 0
• Views: 2,002
10-18-2007, 09:09 PM
5. ### Urgently Need Help

Hi, l'm stuck on these problems..need help. 1) Suppose yu have conversations with yo friend on 100 diff topics. On any given topic there's a...

• Replies: 2
• Views: 2,500
10-17-2007, 11:23 AM
6. ### probability for an event to happen

hi, i have an event which occurs every 60 secs what's the probability of this to occur 15 secs after the beginning of a trial. what will be the...

• Replies: 0
• Views: 2,628
10-16-2007, 08:06 PM
7. ### Dice Probability (Yahtzee Related)

hi, I am currently doing my Computer Science Dissertation and it it to create a program that can play Yahtzee. My planning involves lots of...

• Replies: 1
• Views: 9,049
10-16-2007, 02:28 PM
8. ### Joint Prob Density Question

I am working on a joint prob. density problem and thought that maybe someone may be able to point me in the correct direction. There is a bag of...

• Replies: 2
• Views: 2,996
10-14-2007, 12:19 PM
9. ### probability. multiple choice, and rewriting tests

for some reason i am drawing a blank on how to start these q's. i have looked through the book and there is no examples like these q's, stupid txt,...

• Replies: 0
• Views: 3,573
10-11-2007, 03:18 AM
10. ### Probability

Hi, I feel that the answer is obvious but for some reason I feel like there is a trick in this question and I was just wondering if someone can help...

• Replies: 1
• Views: 2,445
10-09-2007, 04:22 PM
11. ### Help understanding Expectation of a sum

Hi, I would like some help with understanding the properties of the expectation operator and the summation large sigma. Denote S as the large...

• Replies: 2
• Views: 5,322
10-08-2007, 06:07 AM
12. ### probability of sexing human remains - any help?

Hello everyone. I used to be about average with statistics a long time ago, but have come crashing down with lack of use for many years. I hope...

• Replies: 0
• Views: 2,391
10-07-2007, 12:29 PM
13. ### Statistics Problem (random variables)

Here are some problems for you statistics masters http://www.utd.edu/~ammann/stat3360/node22.html let me know what you guys think...i went...

• Replies: 0
• Views: 2,770
10-06-2007, 11:24 PM
14. ### Probability of Winning

Hi, I'm trying to determine the probability of winning an event based on historical data, but I lack the sample size necessary for some...

• Replies: 1
• Views: 2,058
10-06-2007, 09:29 PM
15. ### Average Profit

Hello, This question has been really confusing me and I was wondering if someone can help me out. The question is as follows: A large...

• Replies: 1
• Views: 3,489
10-06-2007, 06:11 PM
16. ### probability of liscense plate

What is the probability of getting a license plate that has a repeated letter or digit if you live in a state where the scheme is three letters...

• Replies: 1
• Views: 12,985
10-06-2007, 08:21 AM
17. ### Probability question

Hi, I am having a real hard time answering this question and I was wondering if someone can give me some pointers and how to solve this problem: ...

• Replies: 3
• Views: 3,583
10-06-2007, 12:27 AM
18. ### probability tree

Suppose 1 in 25 adults is afflicted with a disease for which a new diagnostic test has been developed. Given that an individual actually has the...

• Replies: 0
• Views: 4,466
10-05-2007, 05:51 PM
19. ### Help me please (homework)

-Suppose a measurement of A has been made over a large population -5% of those population are positive for A -if A is measured on the same subject...

• Replies: 1
• Views: 2,426
10-03-2007, 05:23 AM
20. ### Probability Help

• Replies: 0
• Views: 1,777
10-02-2007, 08:47 PM
21. ### Committee

5 member group A-E What is the Probability of drawing 3 slips from a hat randomly , the committee contains A but not B ? to make up a 3 person...

• Replies: 1
• Views: 2,233
09-27-2007, 03:37 PM
22. ### other expected value question

I'm stumped on this question and i have an exam in a few days. any help would be appreciated A quality control plan for an assembly line involves...

• Replies: 0
• Views: 3,397
09-27-2007, 08:19 AM
23. ### expected value

i'm stuck on a question i'm asked to show that if X is nonnegative integer valued R.V., then E = (sum from n=1 to infinity of P(X>=n) = (sum...

• Replies: 0
• Views: 3,392
09-27-2007, 01:42 AM
24. ### Good Probability Brainteaser Website?

Hi, I'm pretty weak when it comes to probability brainteasers. Does anyone know some websites that have good brainteasers for me to practice on?...

• Replies: 0
• Views: 2,522
09-26-2007, 12:42 PM
25. ### 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: 4,925
09-26-2007, 09:29 AM
26. ### I have no idea.

http://img.photobucket.com/albums/v646/supa69/tablegraph.jpg is a frequency distribution + histogram of reaction times. The Mean of this...

• Replies: 1
• Views: 2,507
09-25-2007, 10:24 PM
27. ### Help: strongly stationary process

Let Z_t, t = ..., -2, -1, 0, 1, 2, ..., be a strictly stationary white noise process and let a, b, c be constants. Which of the following processes...

• Replies: 0
• Views: 3,765
09-22-2007, 09:50 PM
28. ### Probablity of the ceiling falling?

My friend asked me a question. "What is the probability of this ceiling falling?" I was puzzled. Then he replied that the probability is 1/2. Here is...

• Replies: 9
• Views: 4,079
09-22-2007, 08:56 AM
29. ### Probability Two teams are playing a best of three series for the championship

Probability Two teams are playing a best of three series for the championship Two teams are playing a best of three series for the championship....

• Replies: 1
• Views: 2,702
09-21-2007, 07:39 AM
30. ### Probability Help!!! AGAIN

mean is 4300 standard deviation is 750 compute the probability that more than 5000 acres will be burned P(x > 5000) 5000-4300/750 ...

• Replies: 3
• Views: 4,231
09-21-2007, 07:16 AM
31. ### determine underlying distribution

Dear all, I am working on this problem and i want to determine what is the underlying distribution in this experiment. I would appreciate if you...

• Replies: 0
• Views: 2,592
09-19-2007, 10:09 PM

I have been working on this for 2 weeks and I really need help guys! I see everyone has read my stuff but nobody has posted anything. I have used the...

• Replies: 0
• Views: 2,596
09-19-2007, 04:41 PM
33. ### Poisson Help

I am having difficulty figuring out these two problems. Please Help!!! 1.) If 3% of the electric bulbs are defective, find the probability that...

• Replies: 0
• Views: 2,565
09-18-2007, 10:06 PM
34. ### Central Limit Theorem

It has been determined that the average cost to develop a 30 second commericial is 20,000 with a standard deviation of 3000 What is the...

• Replies: 0
• Views: 2,619
09-18-2007, 07:20 AM

I posted the entire question earlier in the thread and I would greatly appreciate it if someone would help me and show me how to do the problem step...

• Replies: 0
• Views: 1,795
09-17-2007, 11:38 PM
36. ### Probability question

Hello, The last time I saw a Statistics class was about 30 year go so forgive me for submitting such an elementary question. DATA: ROW A: 0...

• Replies: 0
• Views: 1,989
09-17-2007, 11:16 AM
37. ### Probability - Im new at this

Here is the question: The probability that petrol pump equipment at the service station becomes damaged by fuel contamination and requires the...

• Replies: 0
• Views: 2,332
09-16-2007, 02:31 PM
38. ### 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: 3,543
09-16-2007, 09:38 AM
39. ### How did I get this answer?

What is the probability of getting 10 heads in 20 flips of a fair coin? n = 20 x = 10 p = 0.5 I plug in the numbers into my ti-84 and get...

• Replies: 1
• Views: 3,608
09-13-2007, 02:49 PM
40. ### i need help!

this is my first year taking a stats class and i dont understand this question if someone could explain how to do it to me that would be greatly...

• Replies: 1
• Views: 2,376
09-13-2007, 01:48 AM
41. ### Variance of stochstic variables

Hi, I have a problem and I cannot find the answer in any textbook or on the internet. The problem is the following. I have two variables, (X &...

• Replies: 2
• Views: 2,404
09-12-2007, 03:30 AM
42. ### Conditional Probability [HELP]

I = innocent, G= guilty P(I) = 1, P(G) = 0 Conditional Probability Test Results: P(+ | I ) =0, P(+ | G ) = 1 Find P(G | +) in other words...

• Replies: 5
• Views: 2,531
09-11-2007, 06:02 PM
43. ### Requested Probability-Help

P(Z>-2.576) is it .5000 + .4951 =.9951

• Replies: 1
• Views: 2,946
09-11-2007, 04:02 PM
44. ### keno problem

In a keno game 20 numbers are picked.We write those numbers down.What is the probability of those original 20 numbers that we wrote down coming up...

• Replies: 1
• Views: 2,937
09-11-2007, 11:59 AM
45. ### circuit failure

A message is transmitted using a binary code of 0's and 1's. Each transmitted bit (0 or 1) must pass through three relays before reaching a receiver....

• Replies: 1
• Views: 4,437
09-11-2007, 12:17 AM
46. ### Probability

Of 1037 ppl who came to the blood bank, 330 ppl had high blood pressure. Estimate the probability that the next person who comes into the blood bank...

• Replies: 2
• Views: 2,399
09-06-2007, 10:34 AM
47. ### Question from a novice

I have not studied statistics in college, but I have a question that is probably a simple one. I have had this discussion with my friends, but we...

• Replies: 1
• Views: 2,357
09-06-2007, 09:31 AM
48. ### Bayes Rule Problem

Ok, I'm trying to learn Baye's Rule, but I'm very new to it. I understand the rule to say P(A given B) = P(B given A) x P(A) / Assuming that...

• Replies: 1
• Views: 2,703
09-04-2007, 09:33 AM
49. ### Probability Help!!!

I need help. The probability that you will pass a test is .74. what is the probability that you will fail the test? Is it .26?

• Replies: 1
• Views: 2,359
09-03-2007, 03:24 AM
50. ### I don't know where to start.

Hi, I need to know how to figure out a question, I am hoping that someone can help me. The question is: there are 3 boxes that generate random...

• Replies: 0
• Views: 2,337
08-29-2007, 03:30 PM
51. ### Probability of 4 byte random occuring in 64K

I would like to replace the NULLs in some compressed data with a sequence of bytes. The maximum size of the data is 64K bytes (each byte is a...

• Replies: 0
• Views: 2,550
08-29-2007, 12:40 PM
52. ### Erlang-k where k is Negative Binomial

I have a stochastic process where calls have exponential interarrival times with parameter L and I have a stationary probability, p, that a call is...

• Replies: 0
• Views: 2,645
08-28-2007, 10:35 AM
53. ### Confidence Interval HELP Plz

Plz Help!!!!!!! I can't figure this out Confidence interval for the population mean: Use of the t distribution A corporation that maintains a...

• Replies: 1
• Views: 5,010
08-21-2007, 11:13 AM
54. ### help

I am having a difficult time understanding probability. Here are some questions I am trying to figure out. 1.) Several students are unprepared for...

• Replies: 1
• Views: 4,526
08-17-2007, 08:06 AM
55. ### Need help with z-test for significance

Below is the table i have that i want to test significance on. Total Status YES NO DONT KNOW 48 N 93.92 1.85 4.23...

• Replies: 1
• Views: 3,224
08-16-2007, 09:44 AM
56. ### consectutive wins in 10,000 events

Hello, Thanks in advance for your help. My question is related to probability. I think I know the answer, but I would like confirmation on my...

• Replies: 1
• Views: 2,387
08-13-2007, 03:40 PM

Ok, So I play poker, and its been an awfully dry night of cards, at one point it feels so bad I start logging it and see that before I quit, I was...

• Replies: 1
• Views: 2,534
08-13-2007, 12:56 PM
58. ### Help!

Hey! I have repeat exams coming up now in a couple of weeks and need some help in different questions! If i gave you my email address would you be...

• Replies: 0
• Views: 1,766
08-12-2007, 08:57 AM
59. ### PLEASE check~ Q2 of my assignment..

I realli wana get all these correct. so...if anyone can also check my answers for question 2... Urn 1 contains 1 red, 3 green and 1 blue ball Urn...

• Replies: 0
• Views: 1,972
08-08-2007, 08:53 PM

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