What does a cumulative percentage show in relation to a dataset?

A cumulative percentage shows the fraction of scores at or below a given score within a dataset. This metric is useful for understanding the distribution of data points. By aggregating percentages up to a specific score, it allows researchers or analysts to see how many observations fall below or equal to that score. For instance, if a cumulative percentage indicates that 70% of participants scored at or below a certain value, it means that 70% of the dataset is represented by scores less than or equal to that value. This understanding is fundamental in statistics as it helps in interpreting data distributions, making it easier to identify thresholds, and compare against cutoff points for decision-making.