17年5月12日 sat考试官方每日一题(数学).

　　sat考试马上就要到来，澳际猜测很多学生会感觉紧张!所以，借助今天的sat资讯，小小编特意给童鞋们带来了一道sat考试题目(数学)，官方出品哦，大家不妨趁此机会练一练手!

　　Mathematics>Standard Multiple Choice

　　Read the following sat test question and thenclick on a button to select your answer.

　　A survey of a random sample of 12000 adults inthe US home-buying market finds that 97% of thosesurveyed recognized a certain real estate brand name. If the margin of error was 2.4%, ofthe following, which is the best estimate of the percent of adults in the home-buying market inthe US who recognize this real estate brand name?

　　A.88%

　　B.92%

　　C.96%

　　D.100%

　　澳际温馨提示：各sat考生在看过上述sat考试题目之后，自己分析解答，再看相应的sat考试答案及解析，会更有效哦!

　　答案：C

　　解析：

　　Choice C is correct. If the researchers repeated thestudy many times with randomly selected groups ofUS adult participants, they would expect the truepercent of adults in the home-buying market whorecognize the real estate brand name to be within the margin of error around the sampleproportion.

　　The interval around the sample statistic is called the confidence interval. In this case, thatinterval is 97%±2.4%.

　　97-2.4=94.6，97+2.4=99.4

　　It is likely that the true percent of US adults in the home-buying market who recognize thebrand name would be between 94.6% and 99.4%.

　　Only one of the options falls within this range. Of these options, it is most likely that 96% ofadults in the US home-buying market recognize the real estate brand name.

　　怎样，这道sat考试题目，sat考生们回答得如何?不管答错答对，答案解析，都一定要认真阅读哦!好啦，今天的文章，就到这里，如想了解其他资讯，欢迎继续锁定澳际教育sat考试频道!谢谢合作!

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