The aim of this paper is to provide an overview of sample size estimations for the most frequent type of group studies that result in continuous, binary and ordered categorical outcomes. In recent ...

Low statistical power undermines the purpose of scientific research; it reduces the chance of detecting a true effect. Perhaps less intuitively, low power also reduces the likelihood that a ...

The probability that the null hypothesis will be rejected when it is actually true is called the false positive rate and is determined by the significance level of the test (called alpha which is ...

Discover how simple random sampling ensures accurate and unbiased population research, offering efficiency and fairness over ...

Key points Listing outcomes to find the probability of combined events Examples Questions Using sample space diagrams to find the probability of combined events Examples Question Taking a logical and ...

The discovery of 3I/ATLAS, only the third confirmed interstellar object ever observed passing through our Solar System, is ...

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