40060 : Rate (binomial) data is not specified correctly. Values in the population field must be positive, and values in the count field must be between zero and the population value.

Description

Rate (binomial) Areal Interpolation assumes each member of a population either has or does not have a particular characteristic (such as a particular disease). For each polygon, the population field specifies the total size of the population, and the count field specifies the number of the population members that have the characteristic. Thus, for each polygon, the count cannot be larger than the population. For proportions to be meaningful, it is required that the population be greater than zero.

Solution

In the Attribute Table of the polygon feature class, sort both the count and population fields to make sure that neither contains negative values (and that population is not zero). If that does not solve the problem, create a new field using Add Field in the Table Options pull-down menu. Using the Calculate Field tool, subtract the population field from the count field, then sort the new field from smallest to largest. Any negative values in the new field indicate that the count field is bigger than the population field, and those polygons should be investigated.