Question: q , is the step in data - mining which includes addressing missing and erroneous data, reducing the number of variables, defining new variables, and

q, is the step in data-mining which includes addressing missing and erroneous data, reducing the number of variables, defining new variables, and data exploration.
a. Data sampling
b. Model assessment
c. Data preparation
d. Data partitioning
q, is the step in data-mining which includes addressing missing and

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