Question | Answer |
value measuring some characteristic of a population | parameter |
value measuring some characteristic of a sample | statistic |
variance of a sample symbol | s² |
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 |