Grouped data is characterized by which feature?

• A. Frequency shown in ranges (continuous)
• B. Data where frequency is shown for discrete values
• C. Data organized into separate non-overlapping classes
• D. Data without any grouping

Answer: (C)

Grouped data is formed by placing individual observations into class intervals. The defining feature is that these intervals are separate and non-overlapping, and together they cover the entire data range so every observation falls into one class. This structure—data organized into distinct, non-overlapping classes—is what characterizes grouped data. If you were listing exact values with frequencies, that would be ungrouped or discrete data, not grouped data. Reporting frequencies in ranges is common in grouped data, but the essential point is the creation of non-overlapping classes.