A Somerville activist is contending that the city’s high-profile Happiness Survey overrepresents the opinions of the wealthy.
In August, the city announced that residents who responded reported their overall life happiness as being 7.7 on a scale of 10. The survey went out over the winter coupled with the annual city census.
Eileen Feldman of the Community Access Project didn’t receive a survey herself, she wrote on the blog Somerville Voices. When she looked at the city’s raw data - posted for the public in late August at somervilleresistat.blogspot.com - she calculated one-quarter of the responses came from people who said their 2010 household income was over $100,000.
Median household income in Somerville is about $70,000, SomerStat senior analyst Daniel Hadley told Feldman. And in fact, he said, there was an unintended missing link in the mail survey.
It missed some residents who live in large buildings, including public housing projects and retirement homes.
So when it comes to happiness, “Our data was not as good as it would have been had we sent the form to individual households rather than the property owners,’’ Hadley said.
To compensate, analysts performed an additional phone and e-mail survey.
“The phone survey was totally random and should have reached the correct proportion of residents in public housing,’’ Hadley said.
He noted the e-mail and phone responses were “similar on many of the key questions’’ to the mail results. The city received 6,167 surveys via the census form, 360 online, and 200 by phone, according to the final report. Analysts also used standard statistical techniques to weight the mail survey data so responses from more affluent residents didn’t have undue importance.
Hadley said he was carefully considering “how to deliver the next happiness survey.’’