alleryControls in an experiment are designed to minimise what?
ACost of the apparatus
BNeed for measurement
CEffects of other variables
DThe number of students
Answer & Solution
Correct answer: C. Effects of other variables
1. Controls keep everything constant except the one factor tested.
2. This minimises the effects of variables other than the independent variable.
3. Controls do not reduce cost, measurement or class size.
_Source: Wikipedia, Experiment, lead section_
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