Examlex
The amount of bleach a machine pours into bottles has a mean of 36 oz.with a standard deviation of 0.15 oz.Suppose we take a random sample of 36 bottles filled by this machine.The sampling distribution of the sample mean will be approximately normal only if the population sampled is normal.
Experimenter Bias
A process where the researchers' expectations inadvertently influence the outcome of a study.
Random
Lacking any definite plan or order or purpose; governed by chance.
Ineffectual Treatment
Medical or therapeutic interventions that fail to produce the desired beneficial outcome.
Manipulated Variable
In experimental research, the manipulated variable is the factor that is intentionally changed or controlled by the researcher to observe its effects on the dependent variable.
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