Whipple's Index Explained

Whipple's Index is a statistical method used to evaluate the quality of age data reported in censuses or surveys. It specifically measures the tendency of individuals to report ages ending in certain digits, typically 0 and 5.

A lower Whipple's Index value indicates higher accuracy and less preference for specific age endings. Conversely, higher values suggest a greater preference for ages ending in 0 or 5, implying less accurate age reporting.

Classifying Age Data Accuracy

The question states an estimated Whipple's Index value of 120.

Different scales exist for interpreting Whipple's Index, but values significantly above 25 generally indicate poor or highly inaccurate data due to strong digit preference. However, based on the context provided and the available options, the index value of 120 is classified as representing Moderate accuracy.