STT 231--EXAM 1 QUESTIONS AND
ANSWERS 2026 VERIFIED.
Observational units (cases) - ANS what is sample data made up of?
variable - ANS what is any characteristic recorded for each case?
categorical variables - ANS variables that assign observational units to a "level, placing each
case into exactly one of two or more categories
quantitative variable - ANS variables that measure a numerical quantity for each case. Unlike
categorical variables, numerical operations like adding and averaging make sense for
quantitative variables
continuous "measurement" and discrete "counting" - ANS what two groups can quantitative
variables be further divided into?
quantitative, discrete variables - ANS variables that can only take on a limited number of
quantities within an interval
quantitative, continuous variables - ANS variables that can take on any value within an
interval
nominal "no arrangement" and ordinal "there IS a logical arrangement" - ANS what two
groups can categorical variables be further divided into?
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, continuous - ANS what kind of variable is a patient's age in years?
nominal - ANS what kind of variable is whether the patient currently smokes (Yes/No)
continuous - ANS what kind of variable is weight/height in (lbs/in^2)
ordinal - ANS what kind of variable is vitamin use coded as 1=regularly, 2=occasionally, 3=no?
continuous - ANS what kind of variable is concentration of beta-carotene (ng/ml) in the
blood?
discrete - ANS what kind of variable is number of current prescriptions patient is currently
taking?
nominal - ANS what kind of variable is whether or not you were born in Michigan?
ordinal - ANS what kind of variable is the day of the week on which you were born?
continuous - ANS what kind of variable is how many miles you currently are form where you
were born (distance)?
discrete - ANS what kind of variable is how many of the original seven Harry Potter books you
have read?
nominal - ANS what kind of variable is the hand you use to write?
nominal - ANS what kind of variable is whether or not you have gotten at least 7 hours of
sleep in the past 24 hours?
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ANSWERS 2026 VERIFIED.
Observational units (cases) - ANS what is sample data made up of?
variable - ANS what is any characteristic recorded for each case?
categorical variables - ANS variables that assign observational units to a "level, placing each
case into exactly one of two or more categories
quantitative variable - ANS variables that measure a numerical quantity for each case. Unlike
categorical variables, numerical operations like adding and averaging make sense for
quantitative variables
continuous "measurement" and discrete "counting" - ANS what two groups can quantitative
variables be further divided into?
quantitative, discrete variables - ANS variables that can only take on a limited number of
quantities within an interval
quantitative, continuous variables - ANS variables that can take on any value within an
interval
nominal "no arrangement" and ordinal "there IS a logical arrangement" - ANS what two
groups can categorical variables be further divided into?
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 9
, continuous - ANS what kind of variable is a patient's age in years?
nominal - ANS what kind of variable is whether the patient currently smokes (Yes/No)
continuous - ANS what kind of variable is weight/height in (lbs/in^2)
ordinal - ANS what kind of variable is vitamin use coded as 1=regularly, 2=occasionally, 3=no?
continuous - ANS what kind of variable is concentration of beta-carotene (ng/ml) in the
blood?
discrete - ANS what kind of variable is number of current prescriptions patient is currently
taking?
nominal - ANS what kind of variable is whether or not you were born in Michigan?
ordinal - ANS what kind of variable is the day of the week on which you were born?
continuous - ANS what kind of variable is how many miles you currently are form where you
were born (distance)?
discrete - ANS what kind of variable is how many of the original seven Harry Potter books you
have read?
nominal - ANS what kind of variable is the hand you use to write?
nominal - ANS what kind of variable is whether or not you have gotten at least 7 hours of
sleep in the past 24 hours?
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 9
