proability

  1. G

    Coin probability problem

    We throw the coin 1 000 000 times. How many times on average will make 13 successful heads? Now the problem with the naive: 1 000 000/(2^13) is that once it made 13 heads the 14 head will happen with 1/2 probability , but it will count as 2 13 successful heads. 15 will happen 4xtimes less, but...
  2. C

    Finding Probability using z-table help

    The question is... Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than -0.976°C. P(Z<-0.976)=...
  3. G

    Generalization of urn problem

    While simple urn problems - given x green and y black balls, whats the probability if we take 6 that 2 will be black etc. are easily solvable with hypergeometric and binomial distribution. Is there a distribution that solves it a general case for example: Given 1000 blue, 1200 green, 2000 red...
  4. J

    Really, Really, Really need help

    I'm not a statistics student and know basic, basic principles. The following question is for my research project. Mass (g) +/- 0.01 grams Drop height (centimeters) +/- 3.00 Shell 53.47 45 No crack 56.78...
  5. J

    Monty Hall extended

    (My question requires knowledge of the Monty Hall problem, i'm assuming on a stats forum most of you will not only have heard it but be bored sick of it so i wont explain it here. If you don't know what it is here's a video: ) Anyway, my question is; after your pick, does it matter if the host...
  6. S

    Probability Distribution

    Suppose it is known that 8% of males are colour blind. In a random sample of 500 males, what is the approximate probability that at least 10% of them are colour blind? Correct answer is 0.05. Can someone show the steps or the idea behind this question. Can someone please help me with this question.
  7. V

    Sample Distribution Probability (unsure if correct answer)

    1. Carlinville, Illinois, has just started an ambitious recycling program. Special trucks collect recyclable products once a week, sorted into barrels of paper, glass, and plastic. The amount of glass recycled per week by a single household is normally distributed with mean 27 pounds and...
  8. T

    Probability

    An MP3 player is loaded with 50 musical selections: 20 rock selections, 13 jazz selections, and 17 blues selections.? Edit The player is set on random play, so selections are played randomly and can be repeated . Determine the probability of each of the following outcomes. (a) The first...
  9. M

    Multinomial probabilty

    Hi, Could anyone suggest what test should I apply in the case I have probabilities of 0. For example, I have a vector of counts 127,2,1,0 and I want to test if this vector fits one of the following probabilities (for example) p1=1,0,0,0 ; p2=0.75,0.25,0,0; p3=0.5,0.25,0.25,0 At first I...
  10. N

    Finding P(AnB') (Homework)

    Hi there, this is my first post on this forum. I am trying to find the probability of P(BnA') the data given is: P(A) = 1/3 P(B) = 1/3 P(AnB) = 1/10 My attempt: P(A') = 1-(1/3) = 2/3 P(BnA')= P(B) * P(A') = 1/3 * 2/3 = 2/9 The reason I think what I did was wrong is because I...
  11. A

    Help in solving a question

    Hello everyone, I am working on some exercise questions from probability. I am stuck at this question. Can somebody help me to solve this. I would really appreciate. In a certain country, 35 percent of people are known to have diabetes. It is also known that people over 65 year of age have...
  12. G

    How to interprets this algorithm

    I make some algorithms to estimate the optimal values. and i want to model it algorithms using probabilistic theorem. but i dont know which algorithm or model is proper expression. at first, i thinks it is a kind of bayesian network. When a given graphical model is A -> B. In...
  13. M

    Event Tree Probability Question

    Event Tree Probability Question. One has tried looking this one up and Googling it, One is also dispraxic so while math can be tricky if one can get the concept and explanation behind something generally work at it until one understands. However, it has to be repeatedly gone over otherwise...
  14. S

    Filter combinations

    1.In football matches,3 teams are played,one is home team and another one is away team,draw team matches is one of them,each team have 15 matches,the player select the matches relevant probability is generated , the best we can say is how likely they are to happen, the player select each team...