The January 2005 Gallup Youth Survey telephoned a random sample of 1,028 U.S. teens and asked
These teens to name their favorite movie from 2004. Napoleon Dynamite had the highest percentage
With 8% of teens ranking it as their favorite movie. Which is true?
I. The population of interest is all U.S. teens.
II. 8% is a statistic and not the actual percentage of all U.S. teens who would rank this movie as
Their favorite.
III. This sampling design should provide a reasonably accurate estimate of the actual percentage of
All U.S. teens who would rank this movie as their favorite.

Question

Quizplus · Accepted Answer

The population of interest is indeed all U.S. teens (I). The 8% is a statistic derived from the sample, not the actual percentage of all U.S. teens (II). A random sample of 1,028 is generally considered large enough to provide a reasonably accurate estimate of the population parameter (III).

The January 2005 Gallup Youth Survey Telephoned a Random Sample