Electrical Code or Electrical Contractor: EF: Exhaust Fan: ELEV: Elevator: EM: Emergency: EMT: Electrical Metallic Tubing: EP: Emergency Power: EPO: Emergency Power Off (Button or Switch) EWC: Electric Water Cooler: F: Fuse: FA: Fire Alarm: FAA: Fire Alarm Annunciator: FLA: Full Load Amperes: FMC: Flexible Metal Conduit: G: Ground: GFCI, GFI: Ground Fault Circuit Interrupter: GND: Ground: GRMC
The hypergeometric distribution is used for sampling without replacement. The density of this distribution with parameters m, n and k (named Np, N-Np, and n, respectively in the reference below) is given by. p(x) = choose(m, x) choose(n, k-x) / choose(m+n, k) for x = 0, â¦, k.
The mean and standard deviation of the hypergeometric distribution. are: In this example, k = 4 because there are four aces in the deck, x = 2. because the problem asks about the probability of getting two. aces, N = 52 because there are 52 cards in a deck, and n = 3. because 3 cards were sampled.