What system divides the percentage scale into four groups?

The percentile system divides data into 100 equal parts, where each percentile represents a specific percentage of the data set. This allows for the ranking and comparison of scores relative to the entire group. While it does provide valuable insights into the distribution of scores, it does not specifically divide the percentage scale into four distinct groups.

The system that accurately divides the percentage scale into four groups is the quartile system. This approach splits the data into four equal segments, or quartiles, each representing 25% of the dataset. The first quartile (Q1) marks the 25th percentile, the second quartile (Q2) is the median at the 50th percentile, and the third quartile (Q3) is the 75th percentile. This enables a clearer analysis of data distribution and variation within specific intervals.

In contrast, the decile system divides the data into ten equal parts, providing a finer segmentation than quartiles but not aligning it with the requested four-group division. The median split concept, while offering a method to separate data into two groups based on the median score, does not pertain to a four-group division and is less comprehensive in categorizing data. Thus, the quartile system is the correct choice for dividing