Methods and apparatus to assign viewers to media meter data

A non-transitory computer readable medium comprising instructions that, when executed, cause a processor to at least:

• determine first probabilities for first panelists in a media meter household during a first set of time periods, the media meter household including a first meter of a first type to monitor a first media presentation device, the first probabilities to be calculated based on first panelist behavior data collected by the first meter of the first type, the first panelist behavior data to identify a first number of minutes of first media played by the first media presentation device without uniquely identifying ones of the first panelists exposed to the first media;
• determine second probabilities for second panelists in a plurality of learning households during a second set of time periods, the plurality of learning households including corresponding second meters to monitor corresponding second media presentation devices, the second meters of a second type different from the first type, the second probabilities to be calculated based on second panelist behavior data collected by the second meters of the second type, the second panelist behavior data to (i) identify a second number of minutes of second media played by the second media presentation devices associated with respective ones of the second meters of the second type and (ii) uniquely identify individual ones of the second panelists exposed to the respective second media;
• compare the first probabilities and the second probabilities to identify a candidate household from the plurality of learning households to associate with the media meter household;
• and
• impute ones of the first number of minutes to individual ones of the first panelists when the second panelist behavior data associated with the candidate household indicates activity during one of the second set of time periods that matches activity in the media meter household during one of the first set of time periods.

A method to impute panelist household media behavior, the method comprising:

• determining, by executing an instruction with a processor, first probabilities for first panelists in a media meter household during a first set of time periods, the media meter household including a first meter of a first type to monitor a first media presentation device, the first probabilities calculated based on first panelist behavior data collected by the first meter of the first type, the first panelist behavior data to identify a first number of minutes of first media played by the first media presentation device without uniquely identifying ones of the first panelists exposed to the first media;
• determining, by executing an instruction with the processor, second probabilities for second panelists in a plurality of learning households during a second set of time periods, the plurality of learning households including corresponding second meters to monitor corresponding second media presentation devices, the second meters of a second type different from the first type, the second probabilities calculated based on second panelist behavior data collected by the second meters of the second type, the second panelist behavior data to (i) identify a second number of minutes of second media played by the second media presentation devices associated with respective ones of the second meters of the second type and (ii) uniquely identify individual ones of the second panelists exposed to the respective second media;
• comparing, by executing an instruction with the processor, the first probabilities and the second probabilities to identify a candidate household from the plurality of learning households to associate with the media meter household;
• and
• imputing, by executing an instruction with the processor, ones of the first number of minutes to individual ones of the first panelists when the second panelist behavior data associated with the candidate household indicates activity during one of the second set of time periods that matches activity in the media meter household during one of the first set of time periods.