Examlex
Find the inverse of the matrix, if it exists.
Observational Methods
Research techniques in which subjects are observed in their natural environment or within a controlled environment without interference from the researchers.
Case History Method
A research approach that involves an in-depth investigation of a single subject or group to uncover patterns and insights.
Randomized
Pertaining to a process of selection or arrangement in which each item of a set has an equal probability of being chosen.
Placebo-controlled
A method in clinical trials where one group receives the treatment being tested and another (the control group) receives a placebo, to assess the treatment's effectiveness.
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