Final answer:
A chart showing the number of occurrences by category is used in a Pareto analysis, which is a tool for identifying the most significant factors in a dataset and prioritizing issues.
Step-by-step explanation:
A chart showing the number of occurrences by category would be used in a Pareto analysis. In a Pareto chart, which consists of bars sorted by category size from largest to smallest, it is easier to read and interpret the data. This sort of chart is useful for identifying the most significant factors in a dataset and is a staple in quality control processes, where it helps in prioritizing the issues that need the most attention. Bar graphs are extremely versatile and can be used to compare quantities, such as showing relationships between different groups or categories over time. They can also distinguish different groups within a population, making them useful for many types of data analysis. However, when it comes to Pareto analysis, the ordered nature of the bars makes the Pareto chart particularly effective.