: SAGE: sample size calculations and statistical power

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sample size calculations and statistical power

Sample size determination and prospective power analysis are important factors in planning a statistical study, because a study executed with an inappropriate sample size may result in wasted resources. If the sample is too small, the inference goal may not be achieved and true effects may not be detected, and if it is too large, money and resources have been unnecessarily expended, and subjects may have been exposed unnecessarily to a drug or the treatment. [Source: Encyclopedia of Epidemiology; Sample Size Calculations and Statistical Power]

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