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SAT官方每日一题附答案和解析[数学](2019年11月18日)

来源:可可英语 编辑:max    |  可可官方微信:ikekenet

Mathematics

A restaurant chain with 8 locations wants to introduce healthier options to its menu. In order to determine customer preferences, the chain will offer three new healthy options for a two-week period at all of it's locations and analyze the percent of total orders that include at least one of the new healthy options. Which of the following research designs is most likely to produce valid results?

A.Recording how many customers ordered each of the new options at all of the restaurants over the two-week period
B.Asking a random sample of customers at all of the restaurants which new item they might order in the future
C.Recording how many customers ordered each of the new options at one of the restaurants over the two-week period
D.Recording how many customers ordered each of the new options for breakfast at all of the restaurants over the two-week period

重点单词   查看全部解释    
random ['rændəm]

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adj. 随机的,随意的,任意的
adv. 随

 
produce [prə'dju:s]

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n. 产品,农作物
vt. 生产,提出,引起,

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option ['ɔpʃən]

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n. 选择权,可选物,优先购买权
v. 给予选

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determine [di'tə:min]

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v. 决定,决心,确定,测定

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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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representative [repri'zentətiv]

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adj. 代表性的,代议制的,典型的
n. 代

 
recording [ri'kɔ:diŋ]

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n. 录音 动词record的现在分词

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sample ['sæmpl]

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n. 样品,样本
vt. 采样,取样

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