Experimental subjects often drop out of an experiment before it is completed, and that can affect statistical comparisons and conclusions. This is termed experimental mortality, also known as _____.

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A. This is an incorrect answer because experimental subjects often drop out of an experiment before it is completed, and that can affect statistical comparisons and conclusions. This is termed experimental mortality, also known as attrition. Attrition means slowly and slowly withering away. For example, in the classical experiment involving an experimental and a control group, each with a pretest and a posttest, suppose that the heavy drinkers in the experimental group are so turned off by the video on the health effects of binge drinking that they tell the experimenter to forget it and leave. This will be attrition not deaths.
B. The correct answer is "B" because experimental subjects often drop out of an experiment before it is completed, and that can affect statistical comparisons and conclusions. This is termed experimental mortality, also known as attrition. Attrition means slowly and slowly withering away. For example, in the classical experiment involving an experimental and a control group, each with a pretest and a posttest, suppose that the heavy drinkers in the experimental group are so turned off by the video on the health effects of binge drinking that they tell the experimenter to forget it and leave. This will be attrition.
C. This is an incorrect answer because experimental subjects often drop out of an experiment before it is completed, and that can affect statistical comparisons and conclusions. This is termed experimental mortality, also known as attrition. Attrition means slowly and slowly withering away. For example, in the classical experiment involving an experimental and a control group, each with a pretest and a posttest, suppose that the heavy drinkers in the experimental group are so turned off by the video on the health effects of binge drinking that they tell the experimenter to forget it and leave. This will be attrition.
D. This is an incorrect answer because experimental subjects often drop out of an experiment before it is completed, and that can affect statistical comparisons and conclusions. This is termed experimental mortality, also known as attrition. Attrition means slowly and slowly withering away. For example, in the classical experiment involving an experimental and a control group, each with a pretest and a posttest, suppose that the heavy drinkers in the experimental group are so turned off by the video on the health effects of binge drinking that they tell the experimenter to forget it and leave. This will be attrition

Experimental Subjects Often Drop Out of an Experiment Before It