WBUR/MassINC published the results of a new poll. In this poll, interviewees from Massachusetts were asked for whom they will vote: Republican Donald Trump or Democrat Hillary Clinton.
WBUR/MassINC poll results
The results show that 60.0% of interviewees indicated that they would give their vote to former Secretary of State Hillary Clinton, whereas 31.0% would vote for businessman Donald Trump.
This poll was conducted from September 7 to September 10, among a random sample of 506 likely voters. There is a sampling error of +/-4.4 percentage points. Considering this error margin, the gap between both candidates is statistically significant.
Putting the results in context
Single polls may include large errors, and should be treated with caution. Rather than trusting the results from single polls, you should rely on combined polls or, even better, a combined forecast that includes forecasts from different methods, each of which includes different data.
To make the results comparable to forecasts from other methods, you can translate them into two-party vote shares. This procedure yields values of 65.9% for Clinton and 34.1% for Trump.
Comparison to other polls
Looking at an average of Massachusetts polls, Clinton's current two-party vote share is at 63.5%. Compared to her numbers in the WBUR/MassINC poll Clinton's poll average is 2.4 percentage points lower. This difference is within the poll's error margin, which suggests that the poll is not an outlier.
Results compared to the combined PollyVote forecast
The current PollyVote foresees Clinton to gain 64.7% of the two-party vote in Massachusetts. That is, Polly's combined forecast is 1.2 points below her polling numbers. The PollyVote forecast is therefore in line with the poll's margin of error.