ap数学统计学考试真题和选择题技做题技巧分享

　　统计学是ap体系的一门核心课程，是数学中的一个重要分支。主要的学习和考试主题有数据探索、抽样实验、概率和模拟、统计推断等。下面我们分享一些统计学考试的选择题真题，在复习的同学，赶紧点击练题哦~

　　一、考试部分真题

　　1. Which of the following statements about residuals from the least squares line are true?

　　I.The mean of the residuals is always zero.

　　II.The regression line for a residual plot is a horizontal line.

　　III.A definite pattern in the residual plot is an indication that a nonlinear model will show a better fit to the data than the straight regression line.

　　A. I and II

　　B. I and III

　　C. II and III

　　D. I, II, and III

　　E. None of the above gives the complete set of true responses.

　　2.Data are obtained for a group of college freshmen examining their SAT scores (math plus writing plus critical reading) from their senior year of high school and their GPAs during their first year of college. The resulting regression equation is GPA^= 0.55 + 0.00161 (SAT total) with r = 0.632

　　What percentage of the variation in GPAs can be explained by looking at the linear relationship between GPAs and SAT scores?

　　A. 0.161%

　　B. 16.1%

　　C. 39.9%

　　D. 63.2%

　　E. This value cannot be computed from the information given.

　　3.In a study of whether the structure of the adult human brain changes when a new skill is learned, the gray matter volume of four individuals was measured before and after learning a new cognitive skill. The resulting scatterplot was:

　　The correlation above is 0. Three researchers each run the experiment on a new subject and each obtain an additional data point:

　　Match the above scatterplots with their new correlations.

　　A.I:-0.33 II:0 III:0.33

　　B.I:0 II:0.33 III:0.64

　　C.I:0 II:0.33III:1.0

　　D.I:-0.33 II:0 III1.0:

　　E.I:0 II:0.50 III:1.0

　　4.of winning percentage in home games versus average home attendance for professional baseball teams, the resulting regression line is:Winning percentage^=44+0.0003 Attendance

　　What is the residual if a team has a winning percentage of 55% with an average attendance of 34,000?

　　A. -11.0

　　B. -0.8

　　C. 0.8

　　D. 11.0

　　E. 23.0

　　二、选择题答题技巧

　　统计学的选择题备考，最好的方式是多刷题。答题技巧可以参考下面几点建议：

　　1.通读问题与答案

　　在各个问题中，你可以先仔细阅读问题，再浏览答案选项，看答案最终会呈现什么形式。比如，有的问题包含计分，答案可能是数字，需要你计算积分的结果。

　　2.标记重要信息

　　通读题目时，你可以在有重要信息的单词、数字、函数定义、问题要求等下面划线，这可以帮你清晰审题，不容易漏掉重要信息。

　　3.排除法

　　排除法是在做选择题题目时的一个良好方法，不仅在AP数学统计学的选择题考试中可用，在其他科目，或者其他课程中都可以尝试排除法。

　　排除法主要是帮你做选择，大多数时候，你应该可以排除掉多余的几个选项，最后只剩下两个偏难的选项。

　　以上是ap数学统计学考试相关内容分享，题目不会做，考试挑战太大，同学们都可以让考而思的专业老师帮你解决课业问题!