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此套题共计1小时30分钟,共40题
占总分50%
仅可使用铅笔答题
可以使用图形计算器
考试时会提供常用公式表
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1)Height, in meters, is measured for each person in a sample. After the data are collected, all the height measurements are converted from meters to centimeters by multiplying each measurement by 100. Which of the following statistics will remain the same for both units of measure?
The mean of the height measurements
The median of the height measurements
The standard deviation of the height measurements
The maximum of the height measurements
The z-scores of the height measurements
2) A school principal wanted to investigate student opinion about the food served in the school cafeteria. The principal selected at random samples of 50 first-year students, 50 second-year students, 50 third-year students, and 50 fourth-year students to complete a questionnaire. Which of the following best describes the principal’s sampling plan?
A stratified random sample
A simple random sample
A cluster sample
A convenience sample
A systematic sample
3) A candy company produces individually wrapped candies. The quality control manager for the company believes that the weight of the candies is approximately normally distributed with mean 720 milligrams (mg). If the manager’s belief is correct, which of the following intervals of weights will contain the largest proportion of the candies in the distribution of weights?
740 mg to 780 mg
700 mg to 740 mg
680 mg to 720 mg
660 mg to 700 mg
620 mg to 660 mg
2013 AP Statistics 模考MC真题题目 下载链接
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