Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

英語では「sample-size calculation」といい、NEJM誌では、「statistical analysis」の冒頭でこの計算結果を示している論文をよく見かけます。介入研究の場合、新しい治療法や薬の使用により、従来方法と比べて、統計的に有意で臨床的に重要な差（statistically significant ...

Back in the day, we learned in statistics that you need a sample size of at least 2% of the size of population to make statistically significant conclusions about the behavior of the population. In ...

Implementation of the Time-to-Event Continuous Reassessment Method Design in a Phase I Platform Trial Testing Novel Radiotherapy-Drug Combinations—CONCORDE BayeSize applies the concept of effect size ...

Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...