On Tue, 12 Mar 2002 15:14:28 +0100, George <[EMAIL PROTECTED]> wrote:
> from a past exam, I have the following question: > > Which type of sample survey would provide the most reliable data on the > frequency of cinema-going of the population? > > only one of 1,2,3,4 is "correct": > > 1) A house to house survey in the evening > 2) A postal survey based on the electoral list > 3) Interviewing outside the cinema > 4) A household survey based on a population census or register > I suppose the secret must lie within the notion of 'What do you consider to be "the population"?' - in houses, waiting to be surveyed, in the evening. - on the 'electoral list'. < In the U.S., this includes only the 70% or so among the adults who 'register to vote.' > - hanging around outside the cinema. - that heavy definition in #4, which < I bet > is supposed to assume that a 'population census or register' is complete. -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
