applied probability and statistics questions and their
precise answers.Success champ!
statistics - Correct Answers-the science of collecting, organizing, summarizing, and analyzing
data to draw conclusions or answer questions
uncertainty - Correct Answers-statistics are never 100% certain
observational unit - Correct Answers-a person or object to be studied
census - Correct Answers-gather data on the entire population
population - Correct Answers-the group of all observational units we're interested in
parameter - Correct Answers-a value that describes the population
sample - Correct Answers-subset of the population and the data that is gathered from it
statistic - Correct Answers-a value that describes the sample
variable - Correct Answers-something you measure (or observe) about an observational unit
categorical or qualitative variables - Correct Answers-observation units are classified by an
attribute or characteristic
quantitative or numerical variables - Correct Answers-variables have numerical values (but
averages make sense)
discrete - Correct Answers-it is possible to count all the possible values of the variable
continuous - Correct Answers-it is not possible to count all the possible variable values
(generally measurements)
observational study - Correct Answers-observational units are observed but not manipulated
(most surveys)
experiment - Correct Answers-impose a treatment on some of all the observational units and
then observe what happens (drug studies) (only way to prove cause and effect)
precise answers.Success champ!
statistics - Correct Answers-the science of collecting, organizing, summarizing, and analyzing
data to draw conclusions or answer questions
uncertainty - Correct Answers-statistics are never 100% certain
observational unit - Correct Answers-a person or object to be studied
census - Correct Answers-gather data on the entire population
population - Correct Answers-the group of all observational units we're interested in
parameter - Correct Answers-a value that describes the population
sample - Correct Answers-subset of the population and the data that is gathered from it
statistic - Correct Answers-a value that describes the sample
variable - Correct Answers-something you measure (or observe) about an observational unit
categorical or qualitative variables - Correct Answers-observation units are classified by an
attribute or characteristic
quantitative or numerical variables - Correct Answers-variables have numerical values (but
averages make sense)
discrete - Correct Answers-it is possible to count all the possible values of the variable
continuous - Correct Answers-it is not possible to count all the possible variable values
(generally measurements)
observational study - Correct Answers-observational units are observed but not manipulated
(most surveys)
experiment - Correct Answers-impose a treatment on some of all the observational units and
then observe what happens (drug studies) (only way to prove cause and effect)
