stats quiz 1

data

systematically recorded info (#, symbols, labels) together w its context

data table

an arragement of info in which each row represents a case & each column represents a variable

record

info about an individual case

case

the who - an individual (person or inanimate object) about whom or which have data

variable

the what - holds info about the same characteristics for many cases

subject

a human participant in an experiment

context

the who, what, when, where, why, and how

respondent

someone who answers or responds to a survey

sample

cases we examine in seeking understanding of the population

population

all the cases we wish we knew about

sampling frame

all the cases we can potentially contact

identifier

a piece of info that singles out one case

categorical variable

a variable that names categories (a list of words, #s, or symbols)

quantitative variable

a variable in which measured #s act as numerical values/counts and are associated with a unit

unit

quantity or amount adopted as a standard of measurement (eg $)

statistical study

a study that uses a sample to collect data to answer an investigative question

statistician

presents data to the general public

frequency table

a table of counts for each individual category eg favorite ice cream flavors

relative frequency table

a frequency table that shows sets of info compared to all the info by using proportions, percentages, etc

bar graphs

represent frequency tables (gaps between bars)

contingency table

a table that shows the relationship between categorical variables (uses margins) eg favorite ice cream flavors by grade

relative contingency table

a contingency table that shows sets of info compared to all the info by using proportions, percentages, etc

histogram

represnent contingency tables (no gaps between bars)