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Crushing of a stone is called
Control Group
A control group is a group in an experiment or study that does not receive the experimental treatment and is used as a benchmark to measure the effects of the treatment.
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.
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