Tracking polls
CLEP American Government, Chapter 37
Tracking polls
It can estimate how participating groups voted and which issues they report considering. Its design must cover precincts, voting times, early and mail ballots, languages, and refusals. Exit polls are estimates, not official ballot counts, and they describe voters reached by the design rather than nonvoters or all eligible citizens.
A tracking poll repeats comparable measurements over time. Many use a rolling window: each update adds new interviews and drops the oldest. The smoothing makes a trend easier to see, but adjacent estimates share much of the same data and are not independent daily snapshots.
Give every specialized poll one plain-language job: push polls seek persuasion, exit polls sample people who voted, and tracking polls estimate change through repeated measurements. Then read the source note and axes.
Video lesson: Science Behind the News: Opinion Polls & Random Sampling
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