2017 AP Statistics統(tǒng)計(jì)學(xué)真題Practice Exam系列之簡(jiǎn)答題免費(fèi)下載

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2017 AP Statistics Practice Exam Free-Response Questions Free Download

2017 AP統(tǒng)計(jì)學(xué)?？己?jiǎn)答題部分免費(fèi)下載

此套題僅Section II含有簡(jiǎn)答題

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）Population pyramids are a type of bar chart that show the distribution of ages of a country’s population. The distributions of ages of men and women for two countries, A and B, for the year 2015 are shown in the population pyramids below. The age-groups, in years, are listed in the center columns, and the proportions are shown on the horizontal axes. Each bar represents the proportion of the age-group in the population for that sex.

1. Is the proportion of the female population age 60 or older in Country A greater than the proportion of the female population age 60 or older in Country B? Justify your answer.
2. One of the two countries experienced an increase in the birth rate in the years 1946 to 1955 and another increase in the birth rate about 20 years later. Based on the graphs, which country experienced the described increases in birth rate? Justify your answer using information from the graphs.
3. For Country A, in which age-group is the median age of the male population? Justify your answer.

Part B： 6）Emily walks every day, and she keeps a record of the number of miles she walks each day. The histogram and five-number summary below were created from the recorded miles for a random sample of 25 of the days Emily walked. On one of the 25 days in the sample, Emily walked 7.5 miles. From the histogram, it appears that the value 7.5 might be an outlier relative to the other values. Two methods are proposed for identifying an outlier in a set of data.

1. One method for identifying an outlier is to use the interquartile range (IQR). An outlier is any number that is greater than the upper quartile by at least 1.5 times the IQR or less than the lower quartile by at least 1.5 times the IQR. Does such a method identify the value of 7.5 miles as an outlier for Emily’s set of data? Justify your answer.

Another method of identifying an outlier is to investigate whether there is evidence that a value might have come from a population with a mean different from the mean of the population of the other values. Let X and Y represent random variables. X is distributed normally with mean mx and standard deviation s, and Y is distributed normally with mean my and standard deviation s. Consider 1 randomly selected value of Y and n - 1 randomly selected values of X.

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