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Mathematics>Standard Multiple Choice
Read the following SAT test question and thenclick on a button to select your answer.
An online video gaming site with 20 million registeredusers ages 8 and older wants to find out the averagenumber of hours that all of its registered users spend playing offline video games each week. The site administerwd an online survey to 10 comma 000 of its registered users ages 16 through 18, selected at random. The survey asked the question, "How many hours do youspend playing offline video games each week?" The data collected showed that the meannumber of offline gaming hours per user was 8.3 hours per week. What characteristic of thesurvey prevents these results from being generalized to all of the site's users?
A.The age criteria for selecting the users who were surveyed
B.The size of the sample
C.The method used to analyze the data
D.The size of the population
答案：A
解析：
Option A is correct. The results can be generalized only to the population that was randomly sampled.
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