曼哈顿国际英语

Mathematics

A restaurant chain with 8 locations wants tointroduce healthier options to its menu. In order todetermine customer preferences, the chain willoffer three new healthy options for a two-weekperiod at all of it's locations and analyze the percentof total orders that include at least one of the newhealthy 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 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

解析：

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