Patent attributes
An example apparatus includes a memory management unit (MMU) to store audience member records in a first block of memory, the audience member records including attribute-value pairs representative of database subscriber activity data of corresponding audience members subscribed to a database proprietor. The MMU to split the audience member records from an initial node into child nodes based on comparisons of first ones of the attribute-value pairs of the audience member records to a first value threshold. When an arithmetic logic unit (ALU) determines that a quantity of ones of the audience member records does not satisfy a minimum leaf size, store a terminal node value in the second block of the memory to indicate the first child node is associated with one age category. When the ALU determines that the quantity of the ones of the audience member records satisfies the minimum leaf size, split the first child node into second child nodes, the audience member records in the first child node to be: (1) assigned to corresponding ones of the second child nodes based on comparisons of second ones of the attribute-value pairs of the audience member records to a second value threshold, and (2) processed further to create terminal nodes. Generate an age-correction model based on the terminal nodes to facilitate correcting a database subscriber age characteristic associated with a media impression that is logged by a server of the database proprietor based on a network communication transmitted by a client device to report to the server of the database proprietor that media was accessed via the client device.
