SAT考试9月每日精选题11

>>SAT考试练习：SAT考试9月每日精选题11

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Mathematics>Standard Multiple Choice

Read the following sat test question and thenclick on a button to select your answer.

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

A.Recording how many customers ordered each of the new options at all of the restaurants overthe two-week period

B.Asking a random sample of customers at all of the restaurants which new item they mightorder in the future

C.Recording how many customers ordered each of the new options at one of the restaurantsover the two-week period

D.Recording how many customers ordered each of the new options for breakfast at all of therestaurants over the two-week period

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答案：A

解析：

Choice A is correct. Asking customers which newoption they might order in the future does notdetermine actual customer preferences. Onerestaurant may not be representative of the entirechain. Some of the new options may be more appropriate for lunch or dinner. Therefore, thefollowing are less likely to produce valid results:

Asking a random sample of customers at all of the restaurants which new option they mightorder in the future.

Recording how many customers ordered each of the new options in one of the restaurants overthe two-week period.

Recording how many customers ordered each of the new options for breakfast in all of therestaurants over the two-week period.

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