A consensus has developed across all the parties this morning and afternoon that the TNS/mrbi poll in today's Irish Times is a rogue poll.
Rogue polls are a statistically flawed poll which occur on average in one poll in twenty polls. They can be caused in one of two ways:
i) the sample chosen was inadvertently unpresentative of the electorate.
ii) the statistical interpretation or weighting applied to the numbers taken from samples produce mathematical errors.
Rogue polls can be spotted by a number of features:
- the results are out of sync with comparible data
- the results clash in with all credible trends and information
A number of MRBI polls of late has come out with bizarre results.
No-one in any party believed their poll when they showed Fianna Fáil dropping to 31%.
No-one, not even FG, believed it when they said that FG was at 31%.
Now no-one, not even FF, believes FF is at 41%.
FF believes it is in the region of 38-39%. Fine Gael thinks it is at 37%.
FF and FG both believe that FG is around 28%.
All the parties rubbish claims that Labour has lost 3%. And the numbers quoted for Dublin were openly laughed at across the parties. David Davin Power on Six One openly said that "even the most sanguine Fianna Fáil supporter" does not believe the poll numbers.



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