Examlex
An experimenter tests the hypothesis that physical exercise improves mood. Subjects in the experimental group participate on Monday and Tuesday and those in the control group on Wednesday and Thursday. Which of the following is the extraneous variable?
Productivity
An indicator of production effectiveness typically expressed as the proportion of products generated to the resources used in creating them.
Output
The amount of goods or services produced by a company, industry, or economy within a particular period.
Input
Inputs like workforce, raw materials, and financial assets employed in the process of manufacturing products or delivering services.
Factor Substitution Effect
The change in the use of factors of production, like labor and capital, resulting from changes in relative prices or technological advancements.
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