Not sure about newspoll, I assume they use random samples but this on Roy Morgan.
The Roy Morgan Super Panel is a statistically representative sample that accurately represents the Australian population. The panel is drawn from people who were sampled according to strict stratified probability sampling criteria and interviewed ‘face-to-face’ in their homes by Roy Morgan Research
The Roy Morgan Super Panel is the only Panel in Australia (probably in the world) that is only from a statistically valid sample of respondents; - No ‘stacking’ of results like ‘phone-in’ or ‘pop up’ web surveys.
Difficult decision for Rudd as to when to call the election, there are pros and cons for earlier and latter. Maybe he is waiting for Turnbull to lead the lib's so he has a worthy opponent
