【官方】SAT数学每日一题附答案和解析(2018年1月8日)

北京sat培训,sat备考资料,sat网课,sat培训机构,sat保分班,sat真题

每日一练

MathematicsStandard 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.