11 terms

statistics

the science of data

data analysis

the process of organizing, displaying, summarizing, and asking questions about data

individuals

objects described by a set of data

variable

any characteristic of an individual, generally takes on many values (we are interested in how often a variable takes on each value)

categorical variable

places an individual into one of several groups or categories

quantitative variable

takes numerical values for which it makes sense to find an average

distribution

tells us what values a variable takes and how often it takes those values

categorical variables

place individuals into one or several groups or categories

two-way table

describes two categorical variables, organizing counts according to a row variable and a column variable

marginal distribution

The ___________ of one of the categorical variables in a two-way table of counts is the distribution of values of that variable among all individuals described by the table.

conditional distribution

A ____________ of a variable describes the values of that variable among individuals who have a specific value of another variable.