Table 5 PopIndex calculations.

Set of adjustments used to calculate a “population index” (PopIndex), which produces an estimated population when multiplied by structure number. The range in the value of each adjustment indicates the variation within the published record.

AdjustmentMinLowMiddleHighMax
1. Invisible or hidden structures110%110%110%110%110%
2. Contemporaneity of occupation75%80%83%87%90%
3. Residential structures75%80%81.1%83.5%85.7%
4. Late Classic80%83%87.5%92%95%
5. Persons per structure4.004.374.895.405.60
PopIndex (for Late Classic)1.982.553.163.974.51