probabilities

  1. I

    Percentage and probability

    I have this problem I am trying to solve and I am not sure how. Lets say 70% of the demography is white people. Now if I randomly pick 100 people from the same demography, how do I calculate what is the probability there are exactly 70 white people? or more general question, how do I calculate...
  2. A

    Help with the statistics solving

    Violations 0 0 1 2 3 4 5 >5 Fine A$1000 0 0 10 10 10 20 50 (Please note from the table that 0 violations = 0 fines, 1 violation = 0 fines, 2 violations = $10,000 fine, 3 violations = $10,000 fine, 4 violations = $10,000 fine, 5...
  3. M

    Help regarding z-scores and probabilities?

    Can you help me understand how to do these 3 problems? Be specific, please. Here is my homework, word for word: Here we are given the probability, say .9 and we find the values of the random variable (-a and a) that determine a probability of .9 on a standard normal distribution...
  4. A

    Proof the sum of two CDF's is a CDF.

    This is a question my instructor asked in the last midterm exam but nobody was able to solve and he's suggesting it may come out again in the finals: If F(x) and G(X) are two CDF's, prove that H(X) is also a CDF if H(X) = F(X)+G(X)-F(x)G(X) He said something about right...
  5. G

    help for final dissertation in finance- very easy stat - URGENT! :-)

    Hi I am about finishing my thesis in finance but I don't remember anything about statistics and I need your help!! here is my issue: the topic of the thesis is "exit strategies of private equity funds in luxury goods company". The hypothesis is that, given 3 possible types of exits (trade...
  6. E

    Calculate Probability of a value greater than knowing the Mean, St Deviation...?

    I need to Calculate the probability of get 20000 or more with the following statistics; Statistics: Forecast values Trials 5,000 Base Case 0.00 Mean 14,755.75 Median 10,993.67 Mode --- Standard Deviation 10,519.67 Variance 110,663,505.00 Skewness 1.45 Kurtosis 4.40 Coeff. of...
  7. B

    An interesting probability calculation problem

    Hello all! I'll be really glad if you respond to this question. I am working with an interesting probability calculation problem. In my problem there are ratings for 32 chess players. They are divided into two groups to form two chess teams in such a way that each team contains all types of...
  8. A

    Decisions: probabilities and preferences

    Hello everybody. I was wondering if anyone could help me with the following problem. I need to decide between three options: a) spend my holiday in London; b) spend my holiday in Norwich; c) stay at home. My decision depends on two independent variables: 1. the chances that it will rain...
  9. R

    Need help here on probabilities

    Hi, I'm trying to create a template in excel which will give me the probabilities of winning a tennis match. I've done some research already, and tried using the concept of markov chains. I want to know, are there any other concept in statistics that would give the same results? Something...