About this Ontario poll from Mainstreet Research
This Ontario poll was fielded by Mainstreet Research in January 2019, with a middle field date of January 17, 2019. The poll collected data from a total sample of n=1,127 Ontario respondents via IVR technology (automated calls).
The margin of error for an online sample is not applicable.
For comparison purposes, a random sample of this size would yield a margin of error [moe] of ±2.9%, 19 times out of 20 (for entire sample only) around the 50%-mark.
The regional breakdown of this poll was not made publicly available.
If we compare these national numbers with the previous poll from Mainstreet Research (November 2018), the Ontario PC Party remains stable at 41%, the Ontario NDP remains stable at 27%, and the Ontario Liberal Party is up one point (variation smaller than moe).
You can read more information on this poll here.