为了同学们能够更好的复习SAT考试并加强习题锻炼，澳际留学小编每天会给大家整理一到SAT官网每日一题。今天，给小主们准备的是SAT数学真题，话不多说，赶紧看看吧。希望每天的坚持可以对同学们有所帮助。

　　Read the following SAT test question and then click on a button to select your answer.

　　The mean height of the students in Juan's math class is equal to the mean height of the students in his English class. However, while the standard deviation of the heights of students in his math class is 3.2 inches, the standard deviation of the heights of students in his English class is 6.1 inches. Which of the following statements must be true?

　　A. The mean height of the students in Juan's English class is 2.9 inches greater than the mean height of the students in his math class.

　　B. The median height of the students in Juan's English class is 2.9 inches greater than the median height of the students in his math class.

　　C. The median height of the students in Juan's math class is 2.9 inches greater than the median height of the students in his English class.

　　D. The heights of the students in Juan's math class are less variable than the heights of the students in his English class.

　　答案：D

　　解析：

　　Choice D is correct. In a data set, standard deviation measures the amount of dispersion (variation) from the mean (average). A low standard deviation indicates that the data points tend to be close to the mean (low variability) and a high standard deviation indicates that the data points are more spread out relative to the mean (high variability).

　　Because the standard deviation of the heights of the students in Juan's math class (3.2 inches) is is less than the standard deviation of the heights of the students in his English class (6.1 inches), it can be determined that the heights of the students in his math class have less variability than the heights of the students in his English class.

　　以上就是澳际留学小编今天给大家整理的2016年8月sat真题每日一练之数学真题，与大家共享，大家好才是真的好嘛。澳际留学小编希望每天坚持提供一道试题可以帮助同学们顺利通过考试。出国留学，澳际教育一直在!

　　澳际培训在国内首家推出专职“学习规划师”和“留学规划师”制度，对学生全程规划、全程跟踪，全程反馈。我们汇聚了国内外顶级名师，平均教学经验在5年以上，并实行八对一尊享服务——课程规划师，留学规划师，阅读教师，写作教师，听力教师，口语教师，语法教师，词汇教师等八位一体。完善的留学服务保证，整合了十年留学服务经验，让我们能将一流培训和申请服务全程有机结合。

　　澳际六步曲第二步考试指导具体服务项目如下：

　　1. 免费测评模考，分析申请人的问题，制作考试测评报告和备考指导

　　2. 结合申请人的申请目标和考试基础，制定考试整体规划及时间安排

　　3. 提供对申请人有帮助的考试经验和机经等

　　4. 根据需要提供免费口语模拟和指导服务

　　5. 免费修改作文4篇

　　6. 考前心理指导，调整考前心理状态

　　(注：口语模拟和作文修改服务提供时间为每年2月28日-8月1日)

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