Why we will be adding a 14-day average graphic:
To have a demographically balanced sample across the observation period for every 14-day tracking poll wave, each participant in our survey panel has the option to respond to questions during a specific range of days, twice a month.
Our 7-day graphics represent opinions from half our respondents, recorded each day and including responses from the previous 7 days. Due to random variations in who responds each day, the 7-day graphic has been subject to a certain level of periodicity. Our goal for this graphic was to have it more nimbly reflect reactions to news events than it could if the full 14 day wave was included in each data point. We will continue showing this graphic, but we will soon also add a graphic that is based on averages across a full 14-day sample each day.
