Suppose we had a data set of from a call center where customers were asked to choose between the following three options:hear account information, billing questions, and customer service. Using the given order of the three options, and using 0-1 dummy variables to encode the categorical variables, which of the following combinations would yield an entry "customer service"?

a. 000 b. 100
c. 010 d. 001


d
RATIONALE: An entry of "customer service" would be captured using a dummy variable of 0 for "hear account information", a dummy variable of 0 for "billing questions", and a dummy variable of 1 for "customer service". Therefore the correct combination is 001.

Business

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