Test Android StudyStack App

Please help StudyStack get a grant! Vote here.

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

Question | Answer |
---|---|

Addition rule for prob of A or B occurring | P(A or B) = P(A) + P(B) – P(AB) |

Use multiplication rule for joint probability | Prob(AB) = Prob(A|B) × Prob(B) |

Multiplication rule for independent probabilities | Prob(AB) = Prob (A) × Prob(B) |

Probability That at Least One of Two Events Will Occur | P(A or B) = P(A) + P(B) – P(AB) |

Corr(Ri,Rj) | Cov(Ri,Rj) / std(Ri) * std(Rj) |

Expected Value | E(X) = SUM[P(xi)xi] |

Variance | SUM[P(xi)[xi – E(X)]^2] |

Standard deviation | Square root of variance |

Portfolio Variance Var(Rp) | std^2.a * w^2.a + std^2.b * w^2.b + 2w.a * w.b * Cov.ab --> where Cov.ab = rho.ab * std.a * std.b |

Joint Probability Function | find out more... |

Bayes’ Formula | find out more... |

Choosing r Objects from n Objects (when order doesn't matter and only 2 possible labels) | nCr = n! / [ (n-r)! r!] |

Choosing r Objects From n Objects (when order does matter) | nPr = n! / (n-r)! |

Binomial Random Variable | p(x) = [ n!/ (n-x)! x! ] p^x (1-p)^ n-x |

probability function | p(x) = x / 15 for X = {1,2,3,4,5} p(3) = 20% |

Created by:
thongkk
on 2010-09-24