2017 AP Statistics统计学真题Practice Exam系列之选择题免费下载

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2017 AP Statistics Practice Exam Multiple Choice Questions Free Download

2017 AP统计学模考选择题部分免费下载

此套题共计1小时30分钟，共40题

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部分真题预览：

1）Researchers conducted a telephone survey of 427 adults living in a large city. The adults were asked whether they planned to purchase a smart watch in the next year. The table shows the responses categorized by the region of the city in which the residents live.

Which of the following graphical displays is most appropriate for comparing the proportions of those surveyed who plan to purchase a smart watch within the four regions?

1. A scatterplot
2. A boxplot
3. A segmented bar chart
4. A back-to-back stemplot
5. A dotplot

2) A scientist recorded the duration of the eruptions of the Old Faithful geyser in Yellowstone National Park that occurred during a one-month time period. The histogram below shows the distribution of the duration, in seconds, of the eruptions.

Based on the histogram, which of the following is the best description of the distribution?

1. The distribution is uniform, is centered at about 200 seconds, and has a range of at most 250 seconds.
2. The distribution is skewed to the left, is centered at about 125 seconds, and has range of at most 250 seconds.
3. The distribution is skewed to the right, is centered at about 160 seconds, and has a range of at most 250 seconds.
4. The distribution displays two clusters, has a range of at most 200 seconds, and includes outliers below 75 seconds and above 325 seconds.
5. The distribution displays two clusters, with one cluster centered at about 125 seconds and the other centered at about 260 seconds, and has a range of at most 250 seconds

4) Researchers used two footballs of the same size to examine the effect of helium on kicking distance. One football was filled with air, and the other was filled with helium. Eleven people participated in the study. Each person kicked the football willed with air and the football filled with helium, and the kicking distances, in yards, were recorded. The football that was kicked first was determined by the flip of a fair coin, and the people did not know which football was filled with air and which was filled with helium. What type of study was conducted by the researchers and, of the following, which is the appropriated t-interval for inference?

1. A completely randomized design and a t-interval for a difference between means for independent samples
2. A completely randomized design and a t-interval for a mean difference
3. A matched-pairs design and a t-interval for a difference between means for independent samples
4. A matched-pairs design and a t-interval for a mean difference
5. An observational study and t-interval for a difference between means for independent samples

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