1. Announcement:
Want access to a chatbox?
Dason ‎(Devorador de queso)
05-10-2017
Views:
1,912
+ Post New Thread
Page 86 of 91 First ... 36 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 5101 to 5160 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: 30,361
09-30-2005, 09:44 AM
1. ### hello

I need help with a few questions A carton of 12 batteries contains one that is bad. in how many ways can an inspector choose 3 of the batteries...

• Replies: 1
• Views: 1,874
10-18-2006, 11:23 AM
2. ### help me please!

I do not need the answers to these questions, i just need to know how to solve them!!! please!! question 1: A board consisting of 8 members, 3 men...

• Replies: 0
• Views: 2,303
10-17-2006, 05:00 PM
3. ### 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: 4,454
10-15-2006, 05:57 AM
4. ### Probability Question -- Begging for help.

Please help me solve this problem. In a population, 60% of people are liberals. In a 6 person sample of that population what is the probability...

• Replies: 2
• Views: 2,052
10-13-2006, 08:59 AM
5. ### 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: 2,767
10-11-2006, 11:11 AM
6. ### Help!!

I have been trying to figure this problem out...I know it is probably the easiest thing, but I just can't put my finger on it.... If anyone could...

• Replies: 1
• Views: 1,719
10-11-2006, 08:40 AM
7. ### Probablity Question!! HELP PLEASE~~

Suppose that (X, Y) is uniformly distributed over the region defined by 0<y<1-x^2 and -1<x<1, find the joint density.

• Replies: 1
• Views: 2,531
10-10-2006, 11:41 PM
8. ### Probability Questions with Cards

I have this problem in my homework and I'm having trouble with it even if it is probably easy! Can anyone help?? There are 52 cards in a deck of...

• Replies: 2
• Views: 3,672
10-09-2006, 04:55 PM
9. ### Probability Distributions and Densities homework help

Probability distribution for RV X is given by f(x) = { 1/5 for 2 < x < 7; 0 elsewhere find P(3 < X < 5) as a fraction. also, Show that...

• Replies: 3
• Views: 2,651
10-09-2006, 03:38 PM
10. ### I need help ASAP!?!?!

I am having trouble with these problems on my homework. I can't seen to grasp the concept and set up on how to solve these problems. The numbers...

• Replies: 1
• Views: 4,866
10-09-2006, 10:26 AM
11. ### Please Help~~~

Let say if player A scores an average of 3 points per game, and he has played a tons of games already. What fraction of his games will be exactly...

• Replies: 3
• Views: 2,508
10-09-2006, 10:13 AM
12. ### New bee in probability..plzz help..

There are 5 red balls and 5 green balls in an upturned hat. If you remove the balls from the hat at random what are the chances of the following? ...

• Replies: 0
• Views: 1,791
10-08-2006, 10:44 PM
13. ### Joint Probability Distribution

Can anyone help? The problem: Experiment = {A balance six-sided die is rolled twice} Random Variable X = {the number of 4s obtained in two...

• Replies: 3
• Views: 3,645
10-08-2006, 09:28 PM
14. ### deck of cards

A person selects a card from an ordinary deck of cards. If it is a black card, she wins \$3. If it is a red card between or including 2 and 8, she...

• Replies: 1
• Views: 3,836
10-06-2006, 11:28 AM
15. ### selecting randomly from a sample

Hi, I have a sample of 400 observations. if I want to select randomly 100 out of the 400. could I have 5000 different combinations of the elements...

• Replies: 2
• Views: 2,355
10-06-2006, 12:40 AM
16. ### win money

A man won money when he bet unsuspecting patrons that in 4 rolls of a die, he could get at least one six, but he lost money when he bet that in 24...

• Replies: 1
• Views: 2,077
10-05-2006, 06:47 AM
17. ### Given probability calculate std dev

Given normal distribution, mean 500, .95 probability of value between 451 and 549, what is the std dev? How would you calculate the std dev? Thanks.

• Replies: 1
• Views: 3,426
10-05-2006, 06:44 AM
18. ### bag of marbles

A bag with red marbles and blue marbles has more blue than red. If you add red marbles until 1/3 of the marbles in the bag are blue; yellow marbles...

• Replies: 0
• Views: 2,658
10-04-2006, 11:33 PM
19. ### Chuck-a-luck

in the game chuck-a-luck, three dice are rolled. A player bets a certain amount (say \$1) on a number from one to six. If the number appears on one...

• Replies: 0
• Views: 3,871
10-04-2006, 11:23 PM
20. ### Probabilities of Gender Sequences

nCr and nPr doesn't seem to get me anywhere. What the duece?

• Replies: 2
• Views: 6,386
10-04-2006, 02:17 PM
21. ### Help With Negative Binomial Distribution

The negative binomial (Pascal) distribution is defined as: n = alpha + k -1 P(subK)= How do you show that the Variance is: V = alpha...

• Replies: 0
• Views: 2,637
10-02-2006, 07:53 AM
22. ### random problems

I get extremely confused about how to solve these problems. I don't even have examples to go by. For instance: In how many different ways can...

• Replies: 1
• Views: 2,127
10-02-2006, 02:24 AM
23. ### Help Please!!

1.Given f(-1) = 0.15, f(1) = 0.29, f(3) = 0.21, and f(5) = 0.35, find P(X ≤ 1) 2.Given f(-1) = 0.15, f(1) = 0.29, f(3) = 0.21, and f(5) = 0.35,...

• Replies: 1
• Views: 1,983
10-02-2006, 02:00 AM
24. ### Beginning Bayes problem

I'm getting about every other question right, and since the back of the book only has answers, not whole solutions, I can't tell what I'm doing...

• Replies: 1
• Views: 11,714
09-27-2006, 06:24 PM
25. ### Keno or LOTTO style

So, here is how the game goes. suppose that the game uses the numbers 1 through 50 and suppose that the operator selects eight of these. If the...

• Replies: 21
• Views: 10,583
cet
09-27-2006, 04:41 PM
26. ### Probability Density Function

Given that: f(y1, y2) = 3 - 3y2 where 0 < y1 < y2 < 1 I'm trying to find the probability: P(Y1 < .5|Y2 < .75), which is a conditional density. ...

• Replies: 1
• Views: 5,129
09-27-2006, 12:01 PM
27. ### Anyone can help me?

I have a question asking about how to calculate the probability when the number of outcomes is not finite. Two points L and M are placed...

• Replies: 0
• Views: 1,786
09-27-2006, 06:29 AM
28. ### Average probability and empirical probability

This is probably very simple. The problem I have relates to a far more complex calculation, but if I can understand the maths it will be easy enough...

• Replies: 2
• Views: 4,316
09-24-2006, 09:08 PM
29. ### Expectation, variance and covariance question

Hi I have a question which I stuck some point. Question: X_t, X_s, Y_t, Y_s, Z_t, Z_s, (~Z_t), (~Z_s) are i.i.d time series r.v. (~ is tilda...

• Replies: 0
• Views: 3,323
09-24-2006, 06:58 PM
30. ### 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: 2,922
09-24-2006, 10:39 AM
31. ### probability

what is hypergeometric experiment?

• Replies: 4
• Views: 2,527
09-24-2006, 09:38 AM
32. ### prove inequality

inequality theorem

• Replies: 0
• Views: 3,689
09-23-2006, 05:48 PM
33. ### A solitaire game with no possible moves?

Hi everyone. I just opened a solitaire game on my computer with no moves possible. Does anyone have any idea what the probability of this happening...

• Replies: 0
• Views: 2,431
09-21-2006, 09:17 PM
34. ### probability

The attendance at football games at a certain stadium is normally distributed. with a mean of 55,000 and a standard deviation of 4500 A)what is...

• Replies: 7
• Views: 2,802
09-21-2006, 07:43 PM
35. ### probability distribution

A school is administering a final examination. assume that the length of time required to complete the test is normally distributed, with a mean of...

• Replies: 3
• Views: 2,603
09-21-2006, 07:24 PM
36. ### I need help in finding the probability

Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other...

• Replies: 1
• Views: 6,323
09-21-2006, 03:31 PM
37. ### Test score probabilities problem

Hi, appreciate any help you can provide. I tested patterns on salamanders as personal identifiers by giving human subjects images of 7 different...

• Replies: 0
• Views: 2,711
09-21-2006, 10:16 AM
38. ### probability

a pharmaceutical firm claims that a certain medication is 92% effective in relieving arthric pain. if ten people who suffer from arthritis are...

• Replies: 16
• Views: 5,822
09-21-2006, 08:28 AM
39. ### counting rules

"A fleet of ten taxis is to be dispatched to three locations in such a way that three taxis go to the first location, five taxis go to the second...

• Replies: 3
• Views: 3,914
09-21-2006, 06:51 AM
40. ### a probability problem

there are 1000 coins in a bag of which 999 are normal coins (with a head and a tail), and 1 is a ``freak'' coin which has two heads. if one coin is...

• Replies: 1
• Views: 2,526
09-19-2006, 08:17 PM
41. ### Stuck on a problem that should be easy

So this is one of the first problems in our chapter on probability. I'm assuming I am supposed to intuit how to do this, because there are no other...

• Replies: 6
• Views: 5,086
09-19-2006, 02:57 PM
42. ### 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: 2,218
09-19-2006, 09:25 AM
43. ### Probabilty question

I am trying to figure this problem out. I know it seems simple, but for some reason I am having a hard time with this. Can someone show me how to...

• Replies: 1
• Views: 3,037
09-18-2006, 08:40 PM
44. ### Pie slices

Hi all, I would like to know what the probability distribution for the number of pie slices could be. Or the stochastic process behind slicing....

• Replies: 0
• Views: 1,943
09-17-2006, 12:53 PM
45. ### Quick Probability Question

Here's a quick probability question that's been stumping me this afternoon: If I have 9 novels randomly placed on a bookshelf and I remove them...

• Replies: 2
• Views: 2,587
09-16-2006, 08:52 PM
46. ### Geometric Distribution

A geometric Distribution is a discrete probability distribution of a random variable x that satisifies: 1. A trial is repeated unitl a success...

• Replies: 0
• Views: 26,824
09-14-2006, 05:48 PM
47. ### Test Score Probability

I’m trying to compare my grade on my Algebra exam to my fellow students using the normal distribution. Here are the results of the exam: ...

• Replies: 1
• Views: 6,148
09-14-2006, 01:00 PM
48. ### Probability Question

Hi. Can someone point me in the right direction on how to solve this problem: A pair of dice is thrown. Let X be the higher of the two numbers...

• Replies: 7
• Views: 2,881
09-14-2006, 12:43 PM
49. ### I'm curious...

I was just looking over an old exam, and I came across a problem with T scores. I know how to work with z scores, but I'm confused with T scores. I...

• Replies: 1
• Views: 2,299
09-13-2006, 08:35 PM
50. ### Help! Expected value, standard deviations and probabilities...

Hi I have no clue how to even start this....it's been a long time since I've done stats...and this is for a finance class: Suppose a firm's stock...

• Replies: 0
• Views: 2,521
09-13-2006, 06:39 PM
51. ### Probability question

If probability A and B are 0.5 each, how do you find that a probability of A is more than three times the P(B)? Do you simply do: P(A)^3?

• Replies: 3
• Views: 4,000
09-12-2006, 07:05 PM
52. ### Probability Game

A marble is hidden in one of the three boxes. You have to go through two steps: 1. Select one of the boxes. As soon as you selected one of the...

• Replies: 2
• Views: 2,891
09-11-2006, 11:45 PM
53. ### 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: 5,350
09-10-2006, 10:48 PM
54. ### Bayes Theorem - JohnM vs my textbook

To JohnM or anyone who knows... I am struggling with positive and negative predictive values (PPV and NPV) homework problems. My textbook...

• Replies: 2
• Views: 2,994
09-10-2006, 08:27 PM
55. ### Geometric probability

How many times would you expect to tosss a balanced coin to obtain the first head? Ok, I have p(y) = q exp (y-1) * p Is q = 1-p? and I'm...

• Replies: 7
• Views: 3,080
09-10-2006, 05:17 PM

+ Post New Thread

#### Thread Display Options

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.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

#### Icon Legend

Contains unread posts
Contains no unread posts
Hot thread with unread posts
Hot thread with no unread posts
Thread is closed
You have posted in this thread

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts