Certified Nurse Manager and Leader (CNML) Practice Test

What is the concept of a decile in ranking?

1. Dividing a population into five equal parts

2. Splitting ranking into 10 points that each represent 10%

3. Creating four equal segments of a dataset

4. Ranking individuals based solely on performance

The correct answer is: Splitting ranking into 10 points that each represent 10%

The concept of a decile involves splitting a dataset or population into ten equal parts, where each part represents 10% of the total distribution. This allows for a detailed analysis of ranked data, enabling comparisons across different segments. By organizing data in deciles, one can easily identify patterns, trends, and performance benchmarks within a dataset. For example, if you were to rank student scores within a class, each decile would identify the top 10%, 20%, and so forth, up to the lowest 10%, thereby providing valuable insights into the performance distribution. Other answer choices represent either lesser divisions of a dataset or focus on criteria for ranking, which do not capture the specific definition of a decile. For instance, splitting into five equal parts refers to quintiles, while four segments pertain to quartiles. The option concerning ranking based solely on performance does not encompass the concept of decile distributions, as deciles involve broader population segmentation rather than individual performance metrics alone.