Indicate whether each statement below is true or false. If false, explain why.
a) To get a representative sample, you must sample a large fraction of the population.
b) Using modern methods, it is best to select a representative subset of a population systematically.
c) A census is the only true representative sample.
d) A random sample of 100 students from a school with 2000 students has the same precision as a random sample of 100 from a school with 20,000 students.