Kooyong published data – methodology

The Age reported on Redbridge commissioned polling for Climate 200 here.

Redbridge’s methodology and published survey structure were as follows. Series of polls between October 2021 to March 2022.

The studies were conducted via touch-tone response automated phone survey. Surveys are conducted between 17:30 – 20:20 weekdays and 10:00 – 17:30 Saturdays at the local time of respondents so as to not over-sample nonworkers and stay-at-homes.

The studies were conducted among samples of over n=1,000 people aged 18 years and over from a population of 145,399. Telephone numbers were
provided by the client and include both landline and mobile phone numbers. In these surveys between 70% to 80% of respondents were reached via mobile phone.

Weighting

Following the completion of the surveys, the data was weighted using iterative proportional fitting (raking) to reflect local population
proportions including gender, age, education and 2019 Federal first preference vote. The effective margin of error ranged between +/- 3% to 4%.

Published section of the survey.

  1. If a federal election was held today, which of the following would receive your first preference vote?
  • The Labor Party
  • The Liberal Party
  • The Greens
  • Independent Monique Ryan
  • Palmer’s United Australia Party
  • Unsure

 

  1. (If Q1 ≠ Not sure) How certain are you that you will vote that way on election day?
  • Not at all certain
  • Somewhat certain
  • Very certain

 

  1. (If Q1 = Not sure) Being undecided, to which of the following do you have even a slight leaning?
  • The Labor Party
  • The Liberal Party
  • The Greens
  • Independent Monique Ryan
  • Palmers United Australia Party

 

  1. (For respondents who don’t answer ‘The Liberal Party’ or ‘Independent Monique Ryan’ in Q1) If you had to choose, which of the following would you vote for?
  • The Liberal Party
  • Independent Monique Ryan
  • Unsure

Given the extremely high profile nature of the local Independent, Monique Ryan, the survey was designed to ensure an accurate and sound collection of responses based on this seat’s current political tempreture.