12. Experimental Design and ANOVA
Many experiments take place in settings that are to some degree intact and therefore not subject to experimental manipulation. For example, some medical research takes place in hospitals. It’s often true that the experimenter cannot manipulate certain aspects of how the hospital manages health care.
Crossed Factors and Nested Factors
Suppose that an experimenter wants to investigate the effect of cardiologists’ use of digital handheld devices on the success that patients have in managing their blood pressure. If doctors use digital devices to immediately access full in-patient records, modify prescriptions, ...
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