This is a modified version of c:File:2023 Australian Indigenous Voice referendum opinion polling – allow undecideds, May 2022 onwards.svg with a more colour-blind friendly palette and some methodological changes significant enough I thought making a new file was worthwhile. The original "allow undecided" graph included both "leaner" and "non-leaner" questions. That is, it included both polls where the respondents were permitted to answer "undecided" without a follow-up question, and polls where such a follow-up question was included to try and get the respondent to choose a side. As you might imagine, the second sort of poll tends to report lower "undecided" figures, leading to confusing and misleading results when trying to aggregate both sorts of polls at once. To fix this, this new version only lists results from polls WITHOUT a follow-up "leaner" question. "Leaner" polls are now aggregated at c:File:2023 Australian Indigenous Voice referendum opinion polling – forced-choice and leaners only.svg instead.
Own work
Teratix