The advocates for Washington's Referendum 71 didn't do a spectacular job of getting petition signatures. They got enough to teeter, for day after day, on the thin edge between winning and losing ballot status in November.
The final decision on that isn't in yet. But Darryl at the Horse' Ass site, which has done some fine statistical work on political matters in recent years, has been closely following the review of petition signatures. In all petition events, some signatures are ruled invalid for various reasons and thrown out. If all of the R-71 signatures were valid, the proposal would get to the ballot; but if too many were tossed, it would fail. The question has ridden on the failure rate.
Figuring it has been dodgy, but today Darryl was able to put together statistical analyses that seem to nail the results: "The V2 estimator projects the number of valid signatures to be 121,648 giving an excess of 1,071 signatures over the 120,577 needed for the referendum to qualify for the ballot. The projected (duplicate-corrected) rejection rate is 11.65%."
In other words, the referendum is highly likely to just barely make the ballot.