STT 215 Final Exam Vocab Review Questions and Correct Answers

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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

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