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-This 1862 advertisement for Colt's Patent Fire Arms Manufactury suggests that manufacturing was .
Observer Bias
occurs when a researcher's expectations, beliefs, or preferences affect the observation and interpretation of data.
Observer Effect
A phenomenon where the act of observation alters the behavior of the observed subject or system.
Bystander Effect
The Bystander Effect is a social psychological phenomenon where individuals are less likely to offer help to a victim when other people are present.
Subpopulation
A distinct group within a larger population, often defined by specific characteristics or interests.
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