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Кратко рассмотрим основы теории, используемые для оценки мощности и объема выборки. Вернемся к примеры, описанному ранее.
let's briefly examine the kind of statistical theory that lies at the foundation of the calculations used to estimate power and sample size. return to the original example of the politician, contemplating how large an opinion poll should be taken to suit her purposes.