Author Question: _____________is the step in data-mining which includes addressing missing and erroneous data, ... (Read 137 times)

mia · **on:** Jun 24, 2018

_____________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. Data partitioning
c. Data preparation
d. Model assessment

Question 2

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

spencer.martell · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

c
RATIONALE: Data preparation is the step in data-mining which includes addressing missing and erroneous data, reducing the number of variables, defining new variables, and data exploration.

Answer to Question 2

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.