MATH 215 MIDTERM COMPREHENSIVE REVIEW
EXAM SCRIPT EXAM QUESTIONS AND SOLUTIONS
2026 100% CORRECT.
◍ descriptive statistics - methods for organizing, displaying and
describing data using tables, graphs and summary measures
◍ data set - whole set of numbers representing information
◍ element - subject or object about which information is collected
◍ Inferential statistics - methods that use sample results to help
make decisions or predictions about a population
◍ Population - consists of all elements whose characteristics are
being studied
◍ Sample - a portion of the population selected for study
◍ Census - survey that includes every member of the population
◍ Representative sample - sample that represents the characteristics
of the population as closely as possible
, ◍ random sample - sample drawn in such a way that each element of
the population has a chance of being selected
◍ variable - characteristic under study that assumes different values
for different elements
◍ observation - value of a variable for an element
◍ Discrete variable - variable hose values are countable, and can
assume only certain values with no intermediate values
◍ continuous variable - variable that can assume any numerical
value over a certain interval
◍ cross-section data - data collected on different elements at the
same point in time or for the same time period
◍ time series data - data collected on the same element for the same
variable at different points in time
◍ Raw data - data recorded in the sequence in which they are
collected, before they are processed or ranked
◍ Frequency distribution of a qualitative variable - lists all
categories and the number of elements that belong to that category
EXAM SCRIPT EXAM QUESTIONS AND SOLUTIONS
2026 100% CORRECT.
◍ descriptive statistics - methods for organizing, displaying and
describing data using tables, graphs and summary measures
◍ data set - whole set of numbers representing information
◍ element - subject or object about which information is collected
◍ Inferential statistics - methods that use sample results to help
make decisions or predictions about a population
◍ Population - consists of all elements whose characteristics are
being studied
◍ Sample - a portion of the population selected for study
◍ Census - survey that includes every member of the population
◍ Representative sample - sample that represents the characteristics
of the population as closely as possible
, ◍ random sample - sample drawn in such a way that each element of
the population has a chance of being selected
◍ variable - characteristic under study that assumes different values
for different elements
◍ observation - value of a variable for an element
◍ Discrete variable - variable hose values are countable, and can
assume only certain values with no intermediate values
◍ continuous variable - variable that can assume any numerical
value over a certain interval
◍ cross-section data - data collected on different elements at the
same point in time or for the same time period
◍ time series data - data collected on the same element for the same
variable at different points in time
◍ Raw data - data recorded in the sequence in which they are
collected, before they are processed or ranked
◍ Frequency distribution of a qualitative variable - lists all
categories and the number of elements that belong to that category
