3. Please judge whether the following statements are derived from a sample data or
a population data. If it is a sample data, please specify the population that the
sample was selected from.
(a) (5 points) The latest research, presented at the European Society of
Cardiology Congress, in Barcelona found those with low intake of saturated
fat raised chances of early death by 13% compared to those eating plenty.
(b) (5 points) The numbers of rental cars in service last year for three rental car
companies, Hertz, Avis, and Dollar, are 0.29, 0.1, and 0.27 million,
respectively.
(c) (5 points) A report on Big Money revealed that 21% of the investment
managers selected health care as the sector most likely to lead the market in
the next 12 months.