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Dr. Jones systematically varies the brightness in the laboratory (400, 800, and 1600 lumens) while holding other variables constant, and observes that the participants' activity level decreases as the brightness decreases. This illustrates ____.
Level of Risk
The probability or chance of experiencing harm or loss.
One-sample Z-test
A statistical test used to determine whether there is a significant difference between the mean of a sample and a known or hypothesized population mean.
Mean of a Sample
The average value obtained by dividing the sum of all observations in a sample by the number of observations.
Mean of a Population
The average value derived from adding all the values in a population and then dividing by the number of values.
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