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# Statistics - Exam 2

value measuring some characteristic of a population parameter
value measuring some characteristic of a sample statistic
variance of a sample symbol
standard deviation of a sample symbol s
variance of a population symbol σ²
standard deviation of a population symbol σ
mean of a sample symbol x with a line above it
mean of a population symbol mu
process that leads to well defined results called outcomes probability experiment
set of all possible outcomes sample space
if two events can not occur simultaneously mutually exclusive
if one event does not affect the probability of another event statistically independent
The 3 approaches to probability are ____________. classical, relative frequency, subjective
Use classical approach when __________. sample space can be listed, randomness (no bias)
Use relative frequency approach when __________. sample space cannot be listed, bias exists
probabilities based on expert opinions subjective approach
The 4 conditions of binomial experiments are ____________. fixed number of trials, trials are independent, probabilities remain the same per trial, 2 outcomes per trial (success & failure)
number of trials symbol n
number of successes in n trials symbol x (r on calculator)
probability of success per trial symbol p
probability of failure per trial symbol q
factorial symbol !
complement of A symbol A with a line over it
table that lists all possible values of a random variable (x) along with its corresponding probabilities discrete probability distribution
Created by: K1N1V