1 | Page
STT 215 Final Exam Vocab Review
Questions and Correct Answers
Simpson's Paradox Ans: When the direction of the association
between two variables switches direction after the introduction of
a third variable
Quantitative Variable Ans: Observations that take on numerical
values that represent different magnitudes of the variable
Statistic Ans: A numerical summary of a sample taken from the
population
Lurking Variable Ans: An often-unobserved influence that affects
the association between the primary variables of interest
Margin of Error Ans: A measure of variability of a statistic from
one random sample to another
Correlation Coefficient Ans: Describes the strength and direction
of the linear relationship between two variables
Categorical Variable Ans: Each observation belongs to one of a set
of distinct classifications
Sampling Bias Ans: Occurs due to nonrandom samples or
undercoverage
Standard Deviation Ans: A measure of the variability of a
distribution which describes the typical distance from the mean
Parameter Ans: A numerical summary of the population
© 2025 All rights reserved
STT 215 Final Exam Vocab Review
Questions and Correct Answers
Simpson's Paradox Ans: When the direction of the association
between two variables switches direction after the introduction of
a third variable
Quantitative Variable Ans: Observations that take on numerical
values that represent different magnitudes of the variable
Statistic Ans: A numerical summary of a sample taken from the
population
Lurking Variable Ans: An often-unobserved influence that affects
the association between the primary variables of interest
Margin of Error Ans: A measure of variability of a statistic from
one random sample to another
Correlation Coefficient Ans: Describes the strength and direction
of the linear relationship between two variables
Categorical Variable Ans: Each observation belongs to one of a set
of distinct classifications
Sampling Bias Ans: Occurs due to nonrandom samples or
undercoverage
Standard Deviation Ans: A measure of the variability of a
distribution which describes the typical distance from the mean
Parameter Ans: A numerical summary of the population
© 2025 All rights reserved
