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SAT官方每日一题附答案和解析[数学](2020年6月12日)

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Mathematics>Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

A potato chip company produces the same number of snack-sized bags of potato chips every month. A manager at the company randomly selects a sample of snack-sized bags of potato chips to be weighed in a routine quality-assurance check each month. The January sample had a mean weight of 0.95 ounces and a margin of error of 0.06 ounces. The February sample had a mean weight of 0.98 ounces and a margin of error of 0.04 ounces. Based on these findings, which of the following is an appropriate conclusion?

A.Most of the snack-sized bags of potato chips produced by the company in January each had a weight of at least 0.95 ounces, while most of the snack-sized bags of potato chips produced by the company in February each had a weight of at least 0.98 ounces.
B.The mean weight of all the snack-sized bags of potato chips produced by the company in January must have been 0.03 ounces more than the mean weight of all the snack-sized bags of potato chips produced by the company in February.
C.The mean weight of all the snack-sized bags of potato chips produced by the company in January was 0.03 ounces less than the mean weight of all the snack-sized bags of potato chips produced by the company in February.
D.The number of snack-sized bags of potato chips in the January sample was less than the number of snack-sized bags of potato chips in the February sample.

重点单词   查看全部解释    
randomly ['rændəmli]

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adv. 任意地,随便地,胡乱地

 
sample ['sæmpl]

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n. 样品,样本
vt. 采样,取样

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routine [ru:'ti:n]

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n. 例行公事,常规,无聊
adj. 常规的,

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appropriate [ə'prəupriət]

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adj. 适当的,相称的
vt. 拨出(款项)

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check [tʃek]

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n. 检查,支票,账单,制止,阻止物,检验标准,方格图案

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insight ['insait]

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n. 洞察力

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multiple ['mʌltipl]

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adj. 许多,多种多样的
n. 倍数,并联

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conclusion [kən'klu:ʒən]

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n. 结论

 
population [.pɔpju'leiʃən]

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n. 人口 ,(全体)居民,人数

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margin ['mɑ:dʒin]

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n. 差额,利润,页边空白,边缘
vt. 使围

 

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