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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: 31,144
09-30-2005, 09:44 AM
1. ### General Comments Regarding Odds

"To get the probability of winning the jackpot, multiply .00000034847 by the probability of matching the power ball, to get .0000000082969 or odds of...

• Replies: 0
• Views: 3,248
08-29-2005, 10:18 PM
2. ### Probability?

Find the total number of outcomes when choosing the last three digits in a five-digit zip code if the first digit is 6 and the second digit is 1,...

• Replies: 1
• Views: 4,189
08-31-2005, 10:40 PM
3. ### Probability

Question: Melissa must finish two courses, statistics and economics, in order to complete requirements for a degree. All along she has mainttaned an...

• Replies: 2
• Views: 4,257
09-07-2005, 01:21 PM
4. ### Probability

Question 1. A major shoe store is selling brands A,B and C. Probabilities that Brand A,Brand B, or Brand C will not be big sellers are:...

• Replies: 2
• Views: 3,924
09-08-2005, 06:18 PM
5. ### probability help

I'm not looking for simply the answer but i need to know the step by step solution process, and what formula you used if any to solve for it please....

• Replies: 7
• Views: 5,327
09-18-2005, 11:18 AM
6. ### probability

regarding poisson, how would you go about solving if a question reads: A hospital has noted that they admit an average of 8 patients per hour. ...

• Replies: 2
• Views: 6,020
09-18-2005, 11:57 AM
7. ### Probability

You have been put in charge of developing a new game of chance. In this game a person will roll two cubes each having the numbers 1 to 6 on their...

• Replies: 1
• Views: 3,365
09-21-2005, 12:59 PM
8. ### Help with Confidence Intervals

The questions regarding confidence intervals and population means are hard to understand: Please help me set them up in a formula and solve. #3 ...

• Replies: 4
• Views: 6,695
09-26-2005, 10:01 AM

Hi all, please i have only one question and I can finish my qestions exam which isdue to morrow,Please , I beg you to help me. Q: The P - value in...

• Replies: 1
• Views: 7,689
09-29-2005, 07:20 PM
10. ### Buffon's Needle Experiment

This problem is quite interesting: A fine needle of length l is dropped at random on a board covered with parallel lines distance d apart where...

• Replies: 0
• Views: 8,960
10-04-2005, 02:08 PM

I'm having a difficult time figuring this out... confused on how to go about solving, & which formula/steps to use.... A population has a mean...

• Replies: 1
• Views: 7,543
10-06-2005, 08:03 AM

:( I have this statistics problem that i must solve as soon as possible. You have 5 oil paints and 6 water paints. The director of the museum...

• Replies: 3
• Views: 4,788
10-06-2005, 08:46 AM
13. ### too many gumballs

i am pulling my hair out over this chapter on probability. First question which formula do I use to determine this answer. A gumball machine...

• Replies: 1
• Views: 18,028
10-07-2005, 02:25 PM
14. ### fizz fizz away

okay one more for you that i think I know the answer. i apologize if these must seem easy and I may seem :confused: but hey i am not the brightest...

• Replies: 1
• Views: 4,661
10-07-2005, 08:57 PM
15. ### True or False Probability ?

A used car lot has 15 cars. Five of these cars were manufactured in the US and the remainder were made in other countries. If two cars are...

• Replies: 1
• Views: 5,380
10-09-2005, 04:23 PM
16. ### Performing a blood analysis

To perform a certain type of blood analysis the lab tech must perform two procedures. First procedures requires either 1 or 2 steps and the secound...

• Replies: 1
• Views: 11,761
10-09-2005, 04:41 PM
17. ### Probability of a patients trust

Here is my problem. A psychologist determined that the number of hours required to obtain the trust of a patient is 1,2, or 3. Let x be a random...

• Replies: 2
• Views: 3,794
10-09-2005, 05:34 PM

When a customer comes to a bank, there are three primary locations they may select to go to:teller, loan officer, or escrow department. Based on...

• Replies: 1
• Views: 6,418
10-09-2005, 05:43 PM
19. ### I need help please!!!

A mail order company receives an average of five orders per 500 solicitations. If it sends out 100 advertisements, find the probability of receiving...

• Replies: 4
• Views: 10,415
10-09-2005, 08:51 PM
20. ### Births

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 an other...

• Replies: 1
• Views: 16,472
10-09-2005, 09:22 PM
21. ### i hope i make JohnM and quark proud

:eek: okay i managed to do a bonus question on my "take home test" (which is kinda :) . I just want to see if I did it right and answered it...

• Replies: 5
• Views: 4,846
10-10-2005, 08:33 PM
22. ### Help needed

Hi, not sure how to resolve the following: An airplane as a capacity of 23 passengers. The airline knowning that 10% of passengers who have...

• Replies: 2
• Views: 4,606
10-11-2005, 12:20 PM
23. ### multiple choice

please help! if given multiple choice test with 10 questions and each having 5 choices, what is the prob of getting atleast one correct? also of...

• Replies: 1
• Views: 5,760
10-11-2005, 08:56 PM

Question: There are 8,000 teachers at UCLA. The average age of all the teachers is 24 years with a standard deviation of 9 years. A random sample...

• Replies: 5
• Views: 5,797
10-14-2005, 08:55 PM
25. ### Probability

I have two probablity problems I'm stuck on. Just show me how to set up and work the problems and i can go from there> 1. I am a intake nurse...

• Replies: 1
• Views: 3,702
10-15-2005, 10:08 AM
26. ### probability of a flush?

hey guys, so I worked out this problem but i'm just wondering if I am right and maybe how much further in depth I may need to go Question: suppose...

• Replies: 1
• Views: 3,221
10-15-2005, 05:15 PM
27. ### high-low stud

hey, i got this question given to me in stats and it's just not making any sense in my head. in high-low stud a hand counts as low if it consists...

• Replies: 5
• Views: 3,551
10-15-2005, 07:07 PM
28. ### Poll: Let's Make a Deal....

Monty Hall presents you with 3 doors. Behind one of the doors is a new car. Behind the other 2 doors, there's nothing. You make your choice of...

• Replies: 2
• Views: 4,877
10-17-2005, 10:14 AM
29. ### probability--standard deviation question??

A machine has been programmed to bore holes with a mean diameter = 0.15 mm and with a standard deviation = 0.005 mm. Parts will be rejected if the...

• Replies: 3
• Views: 5,463
10-18-2005, 07:39 PM
30. ### Help!! Probability ?????????????

I have a problem and need some step to step computation and a bit of explanantion. Have deadine of tomorrow Here's the problem: Oil company...

• Replies: 9
• Views: 9,213
10-20-2005, 10:24 AM
31. ### more uniform dist.

If a is uniformly distributed over (-21,25), what is the probability that the roots of the equation x+ax+a+80=0 are both real? I have no idea what...

• Replies: 1
• Views: 4,232
10-23-2005, 06:57 PM
32. ### uniform distribution

A manager of a store reports that the time of a customer on the second floor must wait for the elevator has a uniform distribution ranging from 2 to...

• Replies: 5
• Views: 8,861
10-24-2005, 12:04 PM
33. ### deciles

Women's weights are normally distributed with a mean of 143 lb and a standard deviation of 29lb. Find the third decile, D3, which separates the...

• Replies: 1
• Views: 4,915
10-24-2005, 12:20 PM
34. ### Not understanding Normal Distribution

I am having trouble wrapping my head around normal distributions and the revelance it has with statistics.--- Can someone help me to understand in...

• Replies: 3
• Views: 8,232
10-24-2005, 03:43 PM
35. ### Probability

Hello to everyone... I'm very new to stats and have worked through my assignments but am not sure I'm on the right track. The question is: Two...

• Replies: 5
• Views: 4,613
10-24-2005, 10:36 PM
36. ### candy

A candy store owner has daily demand Y for a certain brand of candy sold from the bulk bins. Suppose the owner will never stock more than one...

• Replies: 5
• Views: 4,864
10-25-2005, 04:51 PM
37. ### Conditional Probability

To reduce theft, the ABCD Company screens all its employees with a lie detector test that is known to be correct 90 percent of the time (for both...

• Replies: 0
• Views: 7,662
10-30-2005, 11:59 PM
38. ### Poisson Distribution Question

I am using the Poisson distribution model the determine the probability of an event occurring. I know that the mean of the event occurring is 7. ...

• Replies: 10
• Views: 7,718
11-01-2005, 12:17 PM
39. ### Binomial Probabilities

These kinds of questions can be answered using the binomial probability distribution: 1. If I flip a coin 20 times, what is the probability of...

• Replies: 0
• Views: 50,499
11-01-2005, 02:50 PM
40. ### simple enough?

Hi Folks..just started stats 102. I'm getting a little stuck with the concept of sample space and events. Although I understand both ideas as I'm...

• Replies: 2
• Views: 4,118
11-02-2005, 10:21 AM
41. ### Standard Deviation problem...

At a motor repair shop, a mechanic can tune-up a car in an average of 30 minutes with a standard deviation of 5 minutes. Assume that the time it...

• Replies: 5
• Views: 5,106
11-02-2005, 03:01 PM
42. ### can you help with this as well!?

Suppose that 20% of all subscribers to a business magazine earn an income greater than \$100,000. If the magazine takes a random sample of 20...

• Replies: 4
• Views: 3,487
11-03-2005, 03:15 PM
43. ### help!?!

Suppose you are the admissions officer at a university. Your university has room for a first year class of 5,000. When you admit students, you know...

• Replies: 6
• Views: 3,193
11-04-2005, 12:05 AM
44. ### quest.

Hi! Not looking for answers, just direction -- don't know what type of probability model to use to se up Q: Quality control inspector for company...

• Replies: 2
• Views: 3,337
11-04-2005, 01:49 AM
45. ### Need help

• Replies: 5
• Views: 3,846
11-05-2005, 10:13 PM
46. ### two way tables

Maybe there is no way to do this on this format. However, I am a bit stuck on a question about showing proportions on a two way table....probably...

• Replies: 7
• Views: 4,498
11-06-2005, 04:51 PM
47. ### I had 100 question and I am stuck with the following 7 questions! Help

Suppose the fill amount of bottles of soft drink has been found to be normally distributed with a mean of 2.0 liters and a standard deviation of...

• Replies: 1
• Views: 7,881
11-07-2005, 02:46 PM
48. ### Symbols in statistics

x^n x to the power of n, x^2 is x squared nPr Permutation, nPr = n!/(n-r)! nCr Combination, nCr = n!/(r!(n-r)!) P(A|B)

• Replies: 0
• Views: 11,169
11-07-2005, 04:11 PM
49. ### stuck on probability

I'm just about done my 2nd assignment and find when I stay at it too long I start to space-out on some of even the more seemingly easier items. I...

• Replies: 10
• Views: 4,964
11-07-2005, 05:48 PM
50. ### Probability distribution of x

Hi there... The question is: One of Canada's well-known distance learning institutions published the age profile of its first-time students. A...

• Replies: 2
• Views: 3,328
11-08-2005, 10:48 PM
51. ### in the movies

can someone help me!!!!! i've been stuck in this problem for hours now!!! ack!!!! heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp meeeeeeeeeeeeeeeeeeeeeeee...

• Replies: 4
• Views: 4,062
11-11-2005, 04:53 PM
52. ### Hi I need help w/ sampling distribution.

HI, I'm taking statistics and i was trying to solve a problem, but I couldn't solve it. I was wondering if you could help me out. Here's the...

• Replies: 4
• Views: 4,986
11-11-2005, 07:49 PM
53. ### Margin of Error/Sample Size...

I have another questions that I am not totally sure of the answer.... It has to do with the size of a sample. This is the question... Q: A...

• Replies: 1
• Views: 8,455
11-12-2005, 09:09 AM
54. ### Significance Test: Ho & Ha

Me again :) This is a long assingment I'm working on, and I have another question that I'm doubting my answer on.... This is the question: Q: ...

• Replies: 1
• Views: 81,197
11-13-2005, 09:40 AM
55. ### Confidence Interval and SRS

Another quick question.... Q: Running Red Lights A survey of licensed drivers inquired about running red lights. One question asked "Of...

• Replies: 1
• Views: 17,105
11-14-2005, 09:27 AM
56. ### The Probability of a Flush

Hiya :) Im back for some more assistance.... Q: THE PROBABILITY OF A FLUSH A poker player holds a flush when all 5 cards in the hand belong to...

• Replies: 1
• Views: 30,317
11-14-2005, 09:45 AM
57. ### Explain Terms...

Am I correct? Q: A study compares two groups of mothers with young children who were on welfare two years ago. One group attended a voluntary...

• Replies: 1
• Views: 9,164
11-14-2005, 09:51 AM

During the past forty years, the monthly rate of return of stocks has been approximately normally distrubuted, with u=0.75 percent and sigma=4.2...

• Replies: 10
• Views: 4,871
11-14-2005, 11:34 AM
59. ### statistics help

Hey this is my first time doing this but I am makeing a b in the elementary statistics class that I am in I need help finding out how to find the...

• Replies: 5
• Views: 3,310
11-14-2005, 08:24 PM

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