2012年AP统计学（选择题+简答题）真题及答案PDF下载

2012年AP统计学（选择题+简答题）真题及答案下载（PDF）

2012年AP统计学-选择题真题：

SECTION I

Time—1 hour and 30 minutes

Number of questions—40

Percent of total score—50

Directions: Solve each of the following problems, using the available space for scratch work. Decide which is the best of the choices given and fill in the corresponding circle on the answer sheet. No credit will be given for anything written in the test book. Do not spend too much time on any one problem.

1. Of the following dotplots, which represents the set of data that has the greatest standard deviation?

2. A random sample of 374 United States pennies was collected, and the age of each penny was determined.According to the boxplot below, what is the approximate interquartile range (IQR) of the ages?

(A) 8

(B) 10

(C) 16

(D) 40

(E) 50

3. The histogram above shows the number of minutes needed by 45 students to finish playing a computer game.Which of the following statements is correct?

(A) The distribution is skewed to the right.

(B) The distribution is skewed to the left.

(C) The distribution appears to be normal.

(D) The distribution appears to be chi-square.

(E) The distribution appears to be uniform.

4. A bank surveyed all of its 60 employees to determine the proportion who participate in volunteer activities.Which of the following statements is true?

(A) The bank should not use the data from this survey because this is an observational study.

(B) The bank can use the result of this survey to prove that working for the bank causes employees to participate in volunteer activities.

(C) The bank did not select a random sample of employees, so the survey will not provide the bank with useful information.

(D) The bank would have to use the survey data to construct a confidence interval in order to estimate the proportion of employees who participate in volunteer activities.

(E) The bank does not need to use an inference procedure to determine the proportion of employees who participate in volunteer activities because the survey was a census of all employees.

。。。。余下2012年AP统计学-选择题真题及答案省略！

2012年AP统计学-简答题真题部分：

SECTION II

Part A

Questions 1-5

Spend about 65 minutes on this part of the exam.

Percent of Section II score—75

Directions: Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.

1. The scatterplot below displays the price in dollars and quality rating for 14 different sewing machines.

(a) Describe the nature of the association between price and quality rating for the sewing machines.

(b) One of the 14 sewing machines substantially affects the appropriateness of using a linear regression model to predict quality rating based on price. Report the approximate price and quality rating of that machine and explain your choice.

(c) Chris is interested in buying one of the 14 sewing machines. He will consider buying only those machines for which there is no other machine that has both higher quality and lower price. On the scatterplot reproduced below, circle all data points corresponding to machines that Chris will consider buying.

。。。。余下2012年AP统计学-简答题真题及答案省略！

2012年AP统计学（选择题+简答题）真题及答案下载（PDF），完整版，15元有偿