STT 215 Final Exam Vocab Review
2025/2026 Exam All Answers and
Illustrations Given
Simpson's Paradox - 🧠 ANSWER ✔✔When the direction of the association
between two variables switches direction after the introduction of a third
variable
Quantitative Variable - 🧠 ANSWER ✔✔Observations that take on numerical
values that represent different magnitudes of the variable
Statistic - 🧠 ANSWER ✔✔A numerical summary of a sample taken from the
population
Lurking Variable - 🧠 ANSWER ✔✔An often-unobserved influence that
affects the association between the primary variables of interest
Margin of Error - 🧠 ANSWER ✔✔A measure of variability of a statistic from
one random sample to another
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Correlation Coefficient - 🧠 ANSWER ✔✔Describes the strength and
direction of the linear relationship between two variables
Categorical Variable - 🧠 ANSWER ✔✔Each observation belongs to one of
a set of distinct classifications
Sampling Bias - 🧠 ANSWER ✔✔Occurs due to nonrandom samples or
undercoverage
Standard Deviation - 🧠 ANSWER ✔✔A measure of the variability of a
distribution which describes the typical distance from the mean
Parameter - 🧠 ANSWER ✔✔A numerical summary of the population
Response Variable - 🧠 ANSWER ✔✔The outcome variable
Variability - 🧠 ANSWER ✔✔in a set of numbers, how widely dispersed the
values are from each other and from the mean
Cluster Random Sampling - 🧠 ANSWER ✔✔Identify existing groups of
subjects; select a SRS of the groups
Population Distribution - 🧠 ANSWER ✔✔The distribution from which we
take the sample and which generally has unknown parameters
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
2
PRIVACY STATEMENT. ALL RIGHTS RESERVED
2025/2026 Exam All Answers and
Illustrations Given
Simpson's Paradox - 🧠 ANSWER ✔✔When the direction of the association
between two variables switches direction after the introduction of a third
variable
Quantitative Variable - 🧠 ANSWER ✔✔Observations that take on numerical
values that represent different magnitudes of the variable
Statistic - 🧠 ANSWER ✔✔A numerical summary of a sample taken from the
population
Lurking Variable - 🧠 ANSWER ✔✔An often-unobserved influence that
affects the association between the primary variables of interest
Margin of Error - 🧠 ANSWER ✔✔A measure of variability of a statistic from
one random sample to another
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Correlation Coefficient - 🧠 ANSWER ✔✔Describes the strength and
direction of the linear relationship between two variables
Categorical Variable - 🧠 ANSWER ✔✔Each observation belongs to one of
a set of distinct classifications
Sampling Bias - 🧠 ANSWER ✔✔Occurs due to nonrandom samples or
undercoverage
Standard Deviation - 🧠 ANSWER ✔✔A measure of the variability of a
distribution which describes the typical distance from the mean
Parameter - 🧠 ANSWER ✔✔A numerical summary of the population
Response Variable - 🧠 ANSWER ✔✔The outcome variable
Variability - 🧠 ANSWER ✔✔in a set of numbers, how widely dispersed the
values are from each other and from the mean
Cluster Random Sampling - 🧠 ANSWER ✔✔Identify existing groups of
subjects; select a SRS of the groups
Population Distribution - 🧠 ANSWER ✔✔The distribution from which we
take the sample and which generally has unknown parameters
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
2
PRIVACY STATEMENT. ALL RIGHTS RESERVED
