To ensure that your results are valid, consider the following guidelines when you collect data, perform the analysis, and interpret your results.
- Collect summary data or raw data
- You can create the chart with summarized data or raw data. For summarized data, each observation summarizes a category. Summarized data can be a count or a calculated value, such as a mean. For raw data, each observation is an occurrence or a defect. All the raw data are in one column of the worksheet, with each observation in a separate row.