N
population
n
sample
statistics
the science of collecting, organizing, summarizing, and analyzing info to draw conclusions or answer questions. Provides a measure of confidence in any conclusions.
population
entire group to be studied
sample
a subset of the population being studied
individual
a person or object that is a member of the population being studied
descriptive statistics
organizing and summarizing information collected
inferential statistics
use methods that generalize results obtained from a sample to the population and measure the reliability of the results
statistic
numerical summary of sample
parameter
numerical summary of a population
variables
characteristics of the individuals of the population being studied
qualitative variables
allow for classification of individuals based on some attribute or characteristic
quantitative variables
provide numerical measures of individuals
discrete variables
quantitative variable that has either a finite number of possible values or a countable number of possible values
continuous variables
quantitative variable that has an infinite number of possible values that are not countable
data vary
within a group of individuals there is variation which can explain different results
process of statistics
identify research objective; collect the data needed to answer the question posed in the research objective; describe the data; perform inference (extend the results of the sample to the population and report a level of confidence in the results)
qualitative or quantitative?
nation of origin
qualitative
qualitative or quantitative?
grams of carbs in a doughnut
quantitative
qualitative or quantitative?
number of unpopped kernels in a bag of microwave popcorn
quantitative
qualitative or quantitative?
phone number
qualitative
discrete or continuous?
runs scored in a season by Albert Pujols
discrete
discrete or continuous?
length in minutes of a country song
continuous
discrete or continuous?
temperature on a randomly selected day in Memphis, TN
continuous
discrete or continuous?
points scored in an NCAA basketball game
discrete