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Under fire for its local service, Nielsen released Monday (Nov. 23) positive performance metrics for its national people meter service, touting a five-year high in sample quality.
For the week ending Nov. 15, the sample performance indicator (SPI), which measures the percentage of people who were asked to join Nielsen’s sample and are producing useable data, reached 45.9 percent, its highest levels since May 2004. Year-to-date, the average SPI is 44.4 percent.
In-tab rates, which measure the percent of sets or people that are providing data on a given day, are approaching new highs.
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