Examlex
Dr. Ziser conducts an experiment on life satisfaction using participants above the age of 80. All people above the age of 80 would make up the ____.
Lurking Variables
Unobserved variables that can influence the observed relationship between other variables of interest.
Placebo
A harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect.
Fertilizer
A chemical or natural substance added to soil or land to increase its fertility.
Sunlight
Electromagnetic radiation emitted by the Sun, essential for life on Earth, influencing climate and weather patterns and providing energy for photosynthesis in plants.
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