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2009 AP Statistics統(tǒng)計(jì)學(xué)真題系列之簡(jiǎn)答題免費(fèi)下載

Category: AP課程, 國(guó)際課程, 福利干貨 Date: 2018年9月25日下午7:00

歷年AP?Statistics統(tǒng)計(jì)學(xué)系列

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2009 AP Statistics Free-Response Questions Free Download

2009 AP統(tǒng)計(jì)學(xué)簡(jiǎn)答題部分免費(fèi)下載

此套題共計(jì)1小時(shí)30分鐘，共6題

占總分50%

每道大題可能含有不同數(shù)量的小題

其中Part A建議用時(shí)1小時(shí)05分鐘，共5題，占Section II總分75%

Part B建議用時(shí)25分鐘，共1題，占Section II總分25%

可以使用圖形計(jì)算器

考試時(shí)會(huì)提供常用公式表

完整版下載鏈接見文末

部分真題預(yù)覽：

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國(guó)際課程AP Statistics統(tǒng)計(jì)學(xué)真題與答案下載

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國(guó)際課程AP Statistics統(tǒng)計(jì)學(xué)真題與答案下載

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.