These results are based on a survey conducted by The MassINC Polling Group of 300 registered voters in zip codes around the routes of the MBTA Silver Line 4 and 5 and the MBTA Route 28 bus. Live telephone interviews were conducted September 9-14, 2015 via both landline and cell phone using conventional registration based sampling procedures. The data were weighted to reflect the demographic and geographic distribution of voters in the sampled zip codes. The margin of sampling error for the full sample is +/- 5.6 percentage points with a 95 percent level of confidence.
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