President Lula’s ratings
There are a few institutions which conduct periodic surveys about the popular ratings of President Lula. Some of the most well regarded institutions are Ibope, Datafolha and VoxPopuli. Apparently, all best practices and statistics models are followed; there are no strong evidences that any institution produces biased survey results. Sizes of the sample for national surveys are between 2,000 and 3,000, which yields results with a margin error between +-2% and +-3%.
- August 1st. 2007. Datafolha conducted the first survey after the air accident which happened in July.
According to this survey, the ratings were very similar to the last survey conducted in March of 2007. Datafolha says, however, that the number of people who rate Lula as Bad/Very Bad is higher (double than total average) among those people who use airplanes. The average grade given to the Government is 6.7 (6.8 among those who do not travel by airplane, and 5.4 among those who do).
