Stat 503 Exam 1 Solved 100% Correct
Question : variation
CORRECT ANSWER : an inherent component
of all living systems
Question : system
CORRECT ANSWER : Anything composed of multiple
interacting parts
Question : sampling error
CORRECT ANSWER : the variation in results from multiple
replications of the same study, due to random chance
Question : census
CORRECT ANSWER : collect data on every individual that
exists
Question : model
CORRECT ANSWER : simplified representation of some
part of the real world
Question : inference
CORRECT ANSWER : a generalization that you can make
about a large group based on logic and evidence (data) collected on a few members of the group
Question : statistical inference
CORRECT ANSWER : a set of formal mathematical
procedures used to make valid generalizations
Question : study population
CORRECT ANSWER : the collection of all individual units
that we want to draw conclusions about
Question : sample
CORRECT ANSWER : a smaller group selected from the
population, that we actually observe and collect data on
Question : sample units
CORRECT ANSWER : the members of the population
Question : statistical sample
CORRECT ANSWER : a group of specimens collected from
the same study population
Question : variable
CORRECT ANSWER : the characteristics of individuals in
the sample that we observe or measure
Question : distribution
CORRECT ANSWER : a mathematical function that
describes the relative commonness or rarity of different values for a variable in a group
Question : statistically related
CORRECT ANSWER : knowing the value of one variable
tells us something about the distribution of the other variable
Question : parameters
CORRECT ANSWER : quantities that summarize the
distribution of a variable in a population
Question : statistic
CORRECT ANSWER: a quantity that is calculated from
data
Question : parameter estimate
CORRECT ANSWER : describe our best guess for the value
of a parameter based on the available data
Question : point estimate
CORRECT ANSWER : the single value that represents our
best guess
Question : standard error
CORRECT ANSWER : quantifies our uncertainty about the
point estimate