The Nonequivalent Before-After Design Controls for ____ but Not for ____

question 6

Multiple Choice

The nonequivalent before-after design controls for ____ but not for ____.

• A) history; maturation
• B) history; selection-maturation
• C) maturation; history
• D) selection-maturation; the Hawthorne effect

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Definitions:

Variance

A measure of the dispersion or spread of a set of data points, calculated as the average of the squared differences from the mean.

Central Tendency

A statistical measure that identifies a single value as representative of the middle of a dataset, commonly the mean, median, or mode.

Outliers

Data points that lie an abnormal distance from other values in a random sample from a population, often indicating a measurement or transcription error, or a novel phenomenon.

Variance

Measures the variability or spread of a set of data points around their mean; it's calculated as the average of the squared differences from the Mean.