OPRE 3360 QUESTIONS AND CORRECT
ANSWERS 2026
conditional probability - CORRECT ANSWER- The probability of an
event given that another event has occurred is
called a... denoted as (aLb)
multiplication law - CORRECT ANSWER- provides a way to compute
the probability of
the intersection of two events. also can be used as a test to see if two
events
are independent.
denoted as p(aNb)
independent event - CORRECT ANSWER- If the probability of event
A is not changed by the existence of event
B,we would say that events A and B are ... p(aLB)= A or p(bLa)= B
two events that are not mutually exclusive - CORRECT ANSWER-
might or might not be
independent.
Statistics - CORRECT ANSWER- study of the collecting, analyzing,
presenting, and interpreting of data
statistics refer to numeric facts such as - CORRECT ANSWER-
average, median, percent
predictive analysis - CORRECT ANSWER- predict what may happen
in the future... don't know data
, types of statistics - CORRECT ANSWER- predictive, descriptive,
prescriptive, and business intelligence
data elements - CORRECT ANSWER- entities on which data are
collected
ex: 60 students in a class
variable - CORRECT ANSWER- a characteristic of interest for the
elements (question's you ask)
ex: gpa, gender,
observation - CORRECT ANSWER- set of measurements obtained
for a particular element (answers to questions)
n elements contains n observations
elements x variables
measurement - CORRECT ANSWER- number of elements times
number of (variables) observation
nominal data - CORRECT ANSWER- just labels that are classified
that CANNOT be sorted... you can't multiply or add, you can only count
ex: student major
ordinal data - CORRECT ANSWER- can be sorted
data is ranked
ex: class level
interval data - CORRECT ANSWER- numeric
meaningful difference between values
ANSWERS 2026
conditional probability - CORRECT ANSWER- The probability of an
event given that another event has occurred is
called a... denoted as (aLb)
multiplication law - CORRECT ANSWER- provides a way to compute
the probability of
the intersection of two events. also can be used as a test to see if two
events
are independent.
denoted as p(aNb)
independent event - CORRECT ANSWER- If the probability of event
A is not changed by the existence of event
B,we would say that events A and B are ... p(aLB)= A or p(bLa)= B
two events that are not mutually exclusive - CORRECT ANSWER-
might or might not be
independent.
Statistics - CORRECT ANSWER- study of the collecting, analyzing,
presenting, and interpreting of data
statistics refer to numeric facts such as - CORRECT ANSWER-
average, median, percent
predictive analysis - CORRECT ANSWER- predict what may happen
in the future... don't know data
, types of statistics - CORRECT ANSWER- predictive, descriptive,
prescriptive, and business intelligence
data elements - CORRECT ANSWER- entities on which data are
collected
ex: 60 students in a class
variable - CORRECT ANSWER- a characteristic of interest for the
elements (question's you ask)
ex: gpa, gender,
observation - CORRECT ANSWER- set of measurements obtained
for a particular element (answers to questions)
n elements contains n observations
elements x variables
measurement - CORRECT ANSWER- number of elements times
number of (variables) observation
nominal data - CORRECT ANSWER- just labels that are classified
that CANNOT be sorted... you can't multiply or add, you can only count
ex: student major
ordinal data - CORRECT ANSWER- can be sorted
data is ranked
ex: class level
interval data - CORRECT ANSWER- numeric
meaningful difference between values
