A researcher wants to find out to what extent local residents participate in the recreation and entertainment activities available in their community. She selects a simple random sample of numbers from the telephone directory and proceeds to call these numbers between 6 P.M. and 9 P.M. If the line is busy or if there is no answer, she uses the next number on her list as a replacement. Comment on both the randomness and the representatives of the sample of persons who end up being interviewed.