2016 AP Statistics统计学真题Practice Exam系列之简答题免费下载

历年AP Statistics统计学系列

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2016 AP Statistics Practice Exam Free-Response Questions Free Download

2016 AP统计学模考简答题部分免费下载

此套题仅Section II含有简答题

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）Natural gas is used in some households to heat the home, to heat the water, and to cook. A utility company sent the following bar chart to a household to show the amount of natural gas, measured in therms (a unit of heat energy), that the household used last year. The chart shows the number of therms and the average monthly temperature, in degrees Fahrenheit, for each month of the year.

1. Describe how the number of therms used each month changed over the year.
2. Construct an appropriate graph that shows the relationship between the number of therms used and the average monthly temperature.
3. Describe what your graph in part (b) reveals about the relationship between the number of therms used and the average monthly temperature that is not revealed on the bar chart sent by the utility company.

Part B： 6）Phone callers to a bank’s customer service center must wait until a service representative is available to answer the phone call. The bank manager is interested in estimating the mean customer wait time. Thirteen calls were selected at random. A histogram of the 13 wait times, in minutes, is shown below.

1. Based on the histogram, explain why it might not be appropriate to use a one-sample t-interval to estimate the mean wait time for all customers.

A logarithmic transformation is often used to transform data such as wait times. Let x represent a customer’s wait time. The log transformation of the customer’s wait time is given by
lo_g10 x . The table below shows the original 13 wait times, the respective log-transformed wait times, and the corresponding means, medians, and standard deviations. A histogram of the 13 log-transformed data values is shown below. The summary statistics for x and log₁₀x are repeated below. b. Based on the histogram, the conditions for inference have been met for the log-transformed data. Construct and interpret a 95 percent confidence interval for the population mean
μ of the log of the wait times.
c. The mean of the log-transformed data is 0.0632 log₁₀ miniutes, which can be converted back to 1.157 minutes by calculating 10^0.0632. Convert the endpoints of your interval in part (b) back to minutes and write the resulting interval.