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为帮助考生们尽早在sat数学考试中取得佳绩，今天，澳际教育小小编准备了一道来自sat官方的题目，大家不妨先那这道sat考试题目来练练手，说不定还会有意想不到的收获哦!话不多说，精彩内容这就呈现!
Mathematics>Standard Multiple Choice
Read the following sat test question and thenclick on a button to select your answer.
The mean height of the students in Juan's math classis equal to the mean height of the students in hisEnglish class. However, while the standard deviation of the heights of students in his mathclass 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 meanheight 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 themedian 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 medianheight 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 thestudents in his English class.
澳际温馨提示：各sat数学考生在看过上述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：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 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.
好啦，这就是澳际教育小编送上的sat数学资讯啦，不知同学们的战绩如何呢?今天的文章，到这里就全部结束了，如需了解掌握sat考试题目，还请继续关注澳际教育sat考试频道!谢谢合作!
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