Investopedia / Matthew Collins A quartile is a statistical term that describes a division of observations into four defined intervals based on the values of the data and how they compare to the ...

We used the first sample to calculate the risk-standardized readmission rate within 30 days for each hospital, and we classified hospitals into performance quartiles, with a lower readmission rate ...

Visualization methods enhance our understanding of sample data and help us make comparisons across samples. Box plots are a simple but powerful graphing tool that can be used in place of ...

Notice that the estimator is defined to be right continuous; that is, the events at t i are included in the estimate of S(t i). The corresponding estimate of the ...

When collecting sets of numeric data that represent sales, customer survey results or other business-related outcomes, you can divide your values in four segments called quartiles. These data ...

The final sample of 200 case subjects and 200 controls provided 90% power to detect an odds ratio for death of 1.8 for the highest FGF-23 quartile as compared with the lowest, with a two-sided ...