Lesson 1 Flashcards
Statistics is
the science of collecting, analyzing, and drawing conclusion from data
A population is
the collection of individuals or objects of interest
the science of collecting, analyzing, and drawing conclusion from data
statistics
the collection of individuals or objects of interest being studied to answer a question
population
Recording all desired information on each unit/member in a population
taking a census
sample/subset
the representative percentage of the population that was utilized to represent the population
the branch of statistics focused on summarizing and displaying data
descriptive statistics
the branch of statistics that uses information gathered from a sample to make statements about the population that was censured.
inferential statistics
Tables, graphs, and numerical summaries
appropriate organization and summation of data collected from a appropriate data source.
a characteristic that may be record for each unit in the population
variable
Observation collected regarding only one variable from each unit in the sample or population
univariate data set
Observations collected regarding two variables from each unit in the sample or population
bivariate data set
observation s collected on two or more variables from each unit in the sample population
multivariate data set.
The variable whose outcome is of primary interest
response variable or outcome variable
The variable that may explain or cause differences in the response variable
explanatory variable
observation for which the variable is a number
numerical ( or quantitative) variables
A numerical values is ________ if the set of possible values that may be observed has an uncountable number of points
continuous
A numerical value is _________ if the set of possible values that may be observed has a countable number of points.
discreet
A qualitative or categorical variable - a number can be associated but does not change the nature of the variable-
it is an either or situation ??? boy or girl
red or blue or green…..
numeric: discrete or continuous; categorical
a persons’s dominant hand
categorical
numeric: discrete or continuous; categorical
the distance a car travels on a tank of gas
numeric and continuous
numeric: discrete or continuous; categorical
the color of a person’s eyes
categorical
numeric: discrete or continuous; categorical
the number of cc transactions at a grocery store during a 24 hour period
numeric and continuous
numeric: discrete or continuous; categorical
the amount of coffee dispensed by a particular machine
numeric and continuous
