Mastering Concepts and Skills 1. Sampling mall shoppers You have probably seen the
pg 189 mall interviewer, clipboard in hand, approaching peo-
ple passing by. Explain why even a large sample of mall
shoppers would not provide a trustworthy estimate
of the current unemployment rate in the city where
the mall is located. Is the proportion of unemployed
people in the sample likely greater than or less than the
proportion of all people who are unemployed?