2008 AP Statistics統(tǒng)計(jì)學(xué)真題系列之簡答題免費(fèi)下載

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2008 AP Statistics Free-Response Questions Free Download

2008 AP統(tǒng)計(jì)學(xué)簡答題部分免費(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）To determine the amount of sugar in a typical serving of breakfast cereal, a student randomly selected 60 boxes of different types of cereal from the shelves of a large grocery store.
The student noticed that the side panels of some of the cereal boxes showed sugar content based on one-cup servings, while others showed sugar content based on three-quarter-cup servings. Many of the cereal boxes with side panels that showed three-quarter-cup servings were ones that appealed to young children, and the student wondered whether there might be some difference in the sugar content of the cereals that showed different-size servings on their side panels. To investigate the question, the data were separated into two groups. One group consisted of 29 cereals that showed one-cup serving sizes; the other group consisted of 31 cereals that showed three-quarter-cup serving sizes. The boxplots shown below display sugar content (in grams) per serving of the cereals for each of the two serving sizes.

1. Write a few sentences to compare the distributions of sugar content per serving for the two serving sizes of cereals.
   After analyzing the boxplots on the preceding page, the student decided that instead of a comparison of sugar content per recommended serving, it might be more appropriate to compare sugar content for equal-size servings. To compare the amount of sugar in serving sizes of one cup each, the amount of sugar in each of the cereals showing three-quarter-cup servings on their side panels was multiplied by 4/3. The bottom boxplot shown below displays sugar content (in grams) per cup for those cereals that showed a serving size of three-quarter-cup on their side panels.
2. What new information about sugar content do the boxplots above provide?
3. Based on the boxplots shown above on this page, how would you expect the mean amounts of sugar per cup to compare for the different recommended serving sizes? Explain.

Part B：

6)Administrators in a large school district wanted to determine whether students who attended a new magnet school for one year achieved greater improvement in science test performance than students who did not attend the magnet school. Knowing that more parents would want to enroll their children in the magnet school than there was space available for those children, the district administrators decided to conduct a lottery of all families who expressed interest in participating. In their data analysis, the administrators would then compare the change in test scores of those children who were selected to attend the magnet school with the change in test scores of those who applied to attend the magnet school but who were not selected.

The tables below show the scores on the same science pretest and the same science posttest for 20 students. Of the 20 students, 8 were randomly selected from the magnet school and 12 were randomly selected from those who applied to attend the magnet school but who were not selected and then attended their original school.

1. Perform a test to determine whether students who attend the magnet school demonstrate a significantly higher mean difference in test scores (Posttest - Pretest) than students who applied to attend the magnet school but who were not selected and then attended their original school.

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