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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: 12,798
09-30-2005, 09:44 AM
1. ### Probability Ideas in the monty Hall problem Stats class assignment help!

Watch a YouTube video that explains the problem: "Monty Hall Problem with Ron Clarke", this video starts with "Hello and welcome to the Monty Hall...

• Replies: 2
• Views: 111
Yesterday, 04:48 PM

I have no idea how to solve this problem A survey of undergraduate calculus and physics students showed that 58% of them had donated blood at...

• Replies: 0
• Views: 124
06-29-2015, 05:32 PM
3. ### how to find MGF ?

E(X^r)=(r+1)!* (2^r). we have to find MGF of random variable X.

• Replies: 0
• Views: 41
06-29-2015, 02:38 PM

I am a 58 yr old Grandpa looking to see if there is Shananagan's are going on at my work. I want to find out the probability in this scenario. You...

• Replies: 2
• Views: 60
06-29-2015, 01:19 PM
5. ### Expected value of absolute value without replacement

I'm trying to figure something out for as a curiosity of mine, and I apparently can't remember enough of my college statistics class to solve it. If...

• Replies: 1
• Views: 31
06-29-2015, 11:31 AM
6. ### Crying inside 😖 just can't quite get probability

I'm taking stats online and this unit is on probability. I'm having a terrible time understanding it. The conditional probability rule is where I'm...

• Replies: 0
• Views: 66
06-29-2015, 03:03 AM
7. ### Mapping a pdf to peaky pdf

Hi All, From past few days I am trying to model this mapping function. I want to map a distribution(uniform/non-uniform) to a more peaky...

• Replies: 0
• Views: 93
06-27-2015, 12:44 PM
8. ### Analysis of Squash Match

I've been stuck on this problem for days. Any help, solutions or just pointers would be very welcome. A squash match is composed of a number of...

• Replies: 0
• Views: 125
pvm
06-25-2015, 07:32 AM
9. ### WANT Theoretical Probabilities theory books suggestion

Hello, I am reading a theoretical probability theory book " Probability Theory: The Logic of science " by E.T.Jaynes. But, this book is very advanced...

• Replies: 1
• Views: 187
06-21-2015, 01:50 AM
10. ### Probability of completing multiples of objects

Hey Guys! I'm struggling with a posed question about completing a set of objects and would really appreciate some direction. EX: There are 10...

• Replies: 3
• Views: 217
06-18-2015, 01:52 PM
11. ### Book recommendations for distributions?

Hi everyone, I'm relatively new to stats (have done two beginner courses on it), and I feel like I learn best when I have an engaging book by my...

• Replies: 2
• Views: 146
06-17-2015, 10:15 PM
12. ### Monty Hall with Bayes Theorem

hi, I just ran across a strange statement in the solution of the MH problem with Bayes as it is described here for instance...

• Replies: 0
• Views: 103
06-17-2015, 12:05 AM
13. ### Calculating observed probability

Can anyone point me towards the formula and extra reading I would need to calculate how many observations I would need to make in order to calculate...

• Replies: 3
• Views: 276
06-12-2015, 06:15 AM
14. ### hi every body

hi everybody I'm new here I'm doing a research I have a questionnaire with 3 scales positive neutral negative which i want to do statics using...

• Replies: 2
• Views: 235
06-11-2015, 09:21 AM
15. ### CHI^2 test for binomial variables which are not normally distributed

Hello, Assume that you have X_1\cdot X_n independant random variables. If they are normally distributed we can use the Chi^2 statistical test to...

• Replies: 0
• Views: 95
CBW
06-10-2015, 07:59 AM
16. ### Conditional density, bivariate normal

Let Z=X+Y where X \sim N(\mu,\sigma^2) and Y \sim N(0,1) are independent. What is the conditional density of X given Z, f_{X|Z}(x|z)? I already...

• Replies: 3
• Views: 167
06-10-2015, 05:51 AM
17. ### Probability Applications - Drawing from a Deck of Cards

Hi! I am having trouble figuring out how to go about solving the following problem: "Find the probability of obtaining the given 5-card poker...

• Replies: 1
• Views: 247
06-06-2015, 12:35 PM
18. ### What is the probability of not drawing a club from a deck of cards

Hi, Can someone help me with this please? You draw 40 playing cards, 1 at a time, with replacement from a standard deck. What is the probability...

• Replies: 2
• Views: 226
06-05-2015, 07:43 AM
19. ### Random numbers

Hello, let me go direct to point: Let's say i have a total of 60 numbers (1-60) and i can generate 6 random numbers among them, in this case: 5,...

• Replies: 11
• Views: 460
06-05-2015, 04:34 AM
20. ### Probability of solder ball inside a sealed package able to cause a failure

I have a hermetically sealed semiconductor package, NAND. And I have some foreign object debris (FOD), solder balls to be exact, inside this device....

• Replies: 0
• Views: 136
06-04-2015, 09:21 AM
21. ### Probability of default

What is the probability of default in 2 years? The probabilit of default year 1= 10% The probability of default year 2 = 10%

• Replies: 0
• Views: 98
06-04-2015, 02:03 AM
22. ### My program TARGETS

I used a Monte Carlo method of finding probabilities of collisions between a randomly tossed circular block and non-overlapping randomly placed...

• Replies: 0
• Views: 152
06-03-2015, 02:42 PM
23. ### Probability

This is not part of any homework, but an odd occurrence that happened within our family and I'd just like to find out what the chances/odds of this...

• Replies: 4
• Views: 330
05-29-2015, 09:54 PM
24. ### Generate simulation data with PDF and ACF

Dear I'am trying to model a wireless channel based on throughput measurements. I've processed the measurements and approximated the PDF of the...

• Replies: 4
• Views: 322
05-27-2015, 09:30 AM
25. ### Probability to win

Hello, I would like to calculate the probability to win 3 times in a lottery considering the following: 1 - the chance to win 1 time is 1 in...

• Replies: 11
• Views: 383
05-25-2015, 01:54 PM
26. ### probability of 8 successes out of 256 events

Hi all hope you are well, i was trying to calculate what the probability of getting exactly 8 successes in 256 events. I used a Binomial on line...

• Replies: 5
• Views: 370
05-25-2015, 06:12 AM
27. ### probability of choosing number

I have a question related to probability of choosing numbers. If there is 5 people picking numbers from 1 to 5, there is 5^5 ways to pick...

• Replies: 1
• Views: 191
05-25-2015, 05:47 AM
28. ### Bayes's Theorem

Hi! Say there is a deck of 100 cards: Red w/ numbers = 40 Red w/ figures=15 Black w/ numbers=35 Black w/ figures=10 The only information...

• Replies: 4
• Views: 236
05-23-2015, 03:22 AM
29. ### Probability definition

Hi stats guys, I had a heated discussion about the following situation today: Let’s say I have a function f(x) producing values between 0 and...

• Replies: 6
• Views: 208
BGM
05-22-2015, 10:40 AM
30. ### A little help

I know that a event with two outcomes such as making a three throw in basketball doesn't necessarily have a probability of 0.50, it could range...

• Replies: 1
• Views: 292
05-18-2015, 07:42 AM
31. ### Bayesian Convergence

I have to go to bed any minute, so I apologize for the lack of detail provided. I was thinking about repeated testing and how probabilities...

• Replies: 7
• Views: 366
05-13-2015, 03:26 AM
32. ### Combination of families of fragility curves (cumulative probability functions)

Hi guys, I am a geotechnical engineer and currently involved in a project for risk calculation of an embankment dam. It's my first post here, I am...

• Replies: 0
• Views: 193
05-11-2015, 09:42 AM
33. ### Probability on Roulette. Just curious!

Hello all. Could you help me? I have been discussing the following topic with my work teammates; We were talking about statistics and...

• Replies: 2
• Views: 266
05-11-2015, 09:26 AM
34. ### Probability of relations in a network

Imagine i have a predicate $friends(p_1, p_2)$ and I know that $p(friends(p_1, p_2)) = p_1$. If I generate a world of $n$ people, I expect there to...

• Replies: 0
• Views: 164
05-08-2015, 07:29 AM
35. ### Google Earth circles probability

Hi everyone. Not sure if this is the right forum but I'll give it a go. Q: If you draw a circle on a sphere, what are the odds that a randomly...

• Replies: 3
• Views: 243
BGM
05-07-2015, 08:58 AM

Suppose you have a FIVE sided dice. One of the sides has a star on it, the other four sides are blank. Suppose you rolled it 10 times. What are the...

• Replies: 1
• Views: 170
05-06-2015, 08:38 PM
37. ### Simple concrete example of Wold theorem?

I'm reading the Wold decomposition theorem for time series in http://faculty.chicagobooth.edu/john.cochrane/research/papers/time_series_book.pdf. ...

• Replies: 0
• Views: 255
04-29-2015, 10:25 PM
38. ### Probabilities and Monte-Carlo simulations - How to rank?

I'm not that statistically clued up within this particular area but it's an issue I am facing for work (bizarrely) and am having trouble of working...

• Replies: 8
• Views: 378
04-28-2015, 10:45 AM
39. ### Poll: A probability problem

Hi all, I would like to solve the problem bellow. To some it might seem to eassy. However i would appreciate some hints. Thanks in advance ... ...

• Replies: 7
• Views: 340
04-26-2015, 04:51 PM
40. ### Binomial question?

I have this question that I think is binomial probability. Bananas that are almost ripe to pick carry the chance of being 15% rotten. What would be...

• Replies: 3
• Views: 311
04-26-2015, 02:11 PM
41. ### Compound Probability

Hey guys, i am having a bit of trouble with this basic probability question which shows that i do not understand the basics at all. The question...

• Replies: 4
• Views: 324
04-26-2015, 10:01 AM

Hello probabilitygeniuses I am very new to probabilities and would like to ask if there are online resources with loads of probability...

• Replies: 5
• Views: 369
04-26-2015, 09:29 AM
43. ### Do independent experiments lend extra weight to probability?

There are two categories of objects, A and B. From long term observation, experiment 1 is known to be 70% accurate i.e. it predicts type A or B...

• Replies: 2
• Views: 270
04-25-2015, 02:01 AM
44. ### Immortality and Conditional Probability

- Hopefully, I won't aggravate readers so much with this approach. - Here, my claim is simply that the likelihood of my current existence is...

• Replies: 71
• Views: 2,405
04-22-2015, 06:50 AM

Hi guys! I have a question: There is link on the main google page with CTR 1.5% (CTR is number of clicked visitors divided by number of all...

• Replies: 0
• Views: 191
04-19-2015, 11:51 AM
46. ### Redundancy probability in employment

The idea of being made redundant after working so many years in a company is everyone's nightmare. I am currently working in a company employing...

• Replies: 2
• Views: 274
BGM
04-18-2015, 01:40 AM
47. ### Using MLE to find the right distribution

Hi, I know that MLE can be used to find the best fitting parameter assuming a that the distribution is known, but is there a way (using Excel or...

• Replies: 2
• Views: 281
04-15-2015, 10:20 PM
48. ### How to calculate combined probability of causally-linked events: joint probability?

Hello, I'm a statistics novice trying to understand how to approach what I suspect is a fairly basic probability problem. I'd be very grateful for...

• Replies: 0
• Views: 199
04-15-2015, 06:44 AM
49. ### How to efficiently allocate marketing dollars among various media?

Should I use expected return on investment for the Net, direct mail flyers, cold calling, etc., and then divide the money or just dump all of it...

• Replies: 0
• Views: 204
04-14-2015, 01:12 PM
50. ### The probability of cannibalism

Hi, I am interested in calculating the probability of cannibalism occurring in groups of fish (25). The species I am looking at are known to...

• Replies: 1
• Views: 175
04-14-2015, 01:03 AM
51. ### Joint Distributions and a 3rd Variable

I am struggling with this probability problem. Consider the random variables X and Y with joint distribution as given below. X 0 1 ...

• Replies: 1
• Views: 238
BGM
04-12-2015, 10:53 AM
52. ### Risk Management

There is 3% coral coverage in a sea area of l=200m b=5m. The size(diameter) of each coral is 50 cm. If we throw a block of 1m2 in the area. How many...

• Replies: 2
• Views: 340
04-11-2015, 07:36 PM
53. ### Continuous joint entropy with fully dependent variable

Consider a variable X with a continuous uniform distribution in the interval and a variable Y that is fully dependent on X, i.e., p(Y=y |...

• Replies: 0
• Views: 209
04-11-2015, 04:59 PM
54. ### Searching for a probability distribution where expected value is zero.

Hi, I am working on an agent based model. And, in the model every agent has an action. The action leads to a certain pay-off. The assumption is...

• Replies: 1
• Views: 280
04-08-2015, 01:25 PM
55. ### Immortality & Bayesian Statistics

- I seem to have written an 8 page paper virtually proving -- through Bayesian statistics -- that we are immortal (or something similar). Obviously,...

• Replies: 81
• Views: 4,269
04-06-2015, 05:11 PM

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