Chapter 1: Introduction Flashcards
descriptive statistics
describes a set of data (ex. average, variability)
inferential statistics
to draw a SAMPLE from a POPULATION for study, i.e. making an inference from a sample and applying it to the population
population
complete set of events in which you are interested
sample
set of actual observations; subset of a population
statistics
numerical values summarizing sample data ex. averages
parameters
numerical values summarizing population data ex. population average
random sample
a sample in which each member of the population has an equal chance of inclusion
meta-analysis
drawing conclusions from a set of similar experiments
decision tree
graphical representation of decisions involved in the choice of statistical procedures
measurement data (quantitative data)
data obtained by measuring objects or events
categorical data (frequency/count data)
data representing counts or number of observations in each category
what are two types of data?
measurement and categorical data