Examlex
A normal distribution curve will have 99.7% of the measured values fall within 2 SDs.
Blind Observer
An individual who assesses experimental data without knowledge of the test subjects' conditions to prevent bias in research findings.
Blind Observations
A research method where the observers are unaware of the participants' conditions or the expected outcome of the experiment to prevent bias.
Random Samples
A subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.
Independent Variables
Factors in an experiment that are intentionally changed to observe their effect on dependent variables.
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