Methods and apparatus to measure market statistics

An apparatus to correct data source error, comprising:

• a hostname resolver to:
• identify a first hostname label based on a reverse resolve of an Internet protocol (IP) address corresponding to a household;
• parse the first hostname label to identify a service provider name;
• invoke a trace route of the IP address corresponding to the household, the trace route originating from two or more originating IP addresses to identify second and third hostname labels with corresponding router last hops, the two or more originating IP addresses different from each other and targeting the same IP address corresponding to the household;
• and
• when the second and third hostname labels include a matching location indicator, confirm the service provider name is valid;
• and
• a data source weight calculator to, when the first hostname label service provider name matches a service provider name in self reported data, correct an error metric of a data source storing the self reported data by adjusting a weight value associated with the self reported data.

A computer readable storage device or storage disk comprising computer readable instructions that, when executed, cause a processor to at least:

• identify a first hostname label based on a reverse resolve of an Internet protocol (IP) address corresponding to a household;
• parse the first hostname label to identify a service provider name;
• invoke a trace route of the IP address corresponding to the household, the trace route originating from two or more originating IP addresses to identify second and third hostname labels associated with corresponding router last hops, the two or more originating IP addresses different from each other and targeting the same IP address corresponding to the household;
• when the second and third hostname labels include a matching location indicator, confirm the service provider name is valid;
• and
• when the first hostname label service provider name matches a service provider name in self reported data, correct an error metric of a data source storing the self reported data by adjusting a weight value associated with the self reported data.