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2009 AP Statistics统计学真题系列之简答题免费下载

Category: AP课程, 国际课程, 福利干货 Date: 2018年9月25日下午7:00

历年AP Statistics统计学系列

真题与答案下载

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2009 AP Statistics Free-Response Questions Free Download

2009 AP统计学简答题部分免费下载

此套题共计1小时30分钟，共6题

占总分50%

每道大题可能含有不同数量的小题

其中Part A建议用时1小时05分钟，共5题，占Section II总分75%

Part B建议用时25分钟，共1题，占Section II总分25%

可以使用图形计算器

考试时会提供常用公式表

完整版下载链接见文末

部分真题预览：

Part A：

1）A simple random sample of 100 high school seniors was selected from a large school district. The gender of each student was recorded, and each student was asked the following questions.

1. Have you ever had a part-time job?

2. If you answered yes to the previous question, was your part-time job in the summer only?

The responses are summarized in the table below.

2009国际课程AP Statistics统计学真题与答案下载

On the grid below, construct a graphical display that represents the association between gender and job experience for the students in the sample.
Write a few sentences summarizing what the display in part (a) reveals about the association between gender and job experience for the students in the sample.
Which test of significance should be used to test if there is an association between gender and job experience for the population of high school seniors in the district?

State the null and alternative hypotheses for the test, but do not perform the test.

Part B：

6)A consumer organization was concerned that an automobile manufacturer was misleading customers by overstating the average fuel efficiency (measured in miles per gallon, or mpg) of a particular car model. The model was advertised to get 27 mpg. To investigate, researchers selected a random sample of 10 cars of that model. Each car was then randomly assigned a different driver. Each car was driven for 5,000 miles, and the total fuel consumption was used to compute mpg for that car.

2009国际课程AP Statistics统计学真题与答案下载

Define the parameter of interest and state the null and alternative hypotheses the consumer organization is interested in testing.
One condition for conducting a one-sample t-test in this situation is that the mpg measurements for the population of cars of this model should be normally distributed. However, the boxplot and histogram shown below indicate that the distribution of the 10 sample values is skewed to the right.
One possible statistic that measures skewness is the ratio (sample mean)/(sample median). What values of that statistic (small, large, close to one) might indicate that the population distribution of mpg values is skewed to the right? Explain.