Sam Smith,the CEO of a Local TV Station,recently Conducted a Study

Multiple Choice

Sam Smith,the CEO of a local TV station,recently conducted a study of TV watchers in his area.He obtained a list of all residential customers from the cable TV company's billing list.He selected customers from the 20 000 households on the billing list by taking every fortieth household.A trained interviewer then visited each household and asked detailed questions about the viewing habits of various family members. What is Sam Smith's sampling ratio?

A) 0.002 or 0.2%
B) 0.005 or 0.5%
C) 0.025 or 2.5%
D) 0.050 or 5%
E) 0.0002 or 0.02%