Math vocab

Population

all members of a group

Sample

a random selection of members from a group

Sample proportion

The percentage taken from a random sample

Sample mean

The average calculated from measurements of a random sample

Bias

a distortion that makes data inaccurate

Independent Events

Events that don’t impact one another

z score

how many standard deviations above (positive) or below (negative) the mean number is

Sample space

a list of all possible outcomes from an event

Normal distribution

data takes on a bell shaped curve based on mean and stndard deviation.

binomial

we want probability for a set number of trials

Geometric

we want the probability of the first success