Statistics Symbols Questions & Answers

Statistics Symbols Questions & Answers 1 - ANSWER: CDF of a Poisson— it will never equal __, it will only approach it (doesn't have a stopping point) 1 - F(a) - ANSWER: P(X greater than or equal to a) 1. "Is it counting a # of successes?" 2. "Do I have a finite Bernoulli Process?" i. "are there a finite # of trials?" ii. "do I have only 2 outcomes?" iii. "is there constant probability?" iv. "are the trials independent?" - ANSWER: how to determine if your distribution is binomial... (5 questions) 1. "Is there a unit of measurement?" 2. "Do we known the avg. # expected per unit of measurement?" i. "Constant probability?" ii. "Independent trials?" - ANSWER: how to determine if your distribution is Poisson... (4 questions) 1. Consists of counting the number of times a certain event occurs during a given unit of time, area, or volume 2. the probability that an event occurs in a given unit of time, area, or volume is the same for ALL the units (constant) 3. the number of events that occur in one unit of time, area, or volume is independent of the number of events that occur in other units (independent) 4. the mean or expected number of events in each unit is known and is denoted by λ - ANSWER: characteristics of a Poisson random variable 1. obtain a "picture" of the data 2. calculate a measure of central tendency 3. calculate a measure of dispersion - ANSWER: 3 things to do when describing a data set: