D204
Identifying business needs - Answer Which activity does an analyst perform in the
discovery phase of the data analytics life cycle?
a. Collecting Data
b. Cleaning Data
c. Identifying outliers
d. Identifying business needs
Data Exploration - Answer In which phase of the data analytics life cycle does an
analyst build a histogram?
a. Data acquisition
b. Data exploration
c. Discovery
d. Predictive modeling
Exploratory data analysis - Answer An analyst applies a statistical formula to obtain the
average temperature for a city over the last 50 years. Which phase of the data analytics
life cycle is represented by this activity?
a. Data acquisition
b. Exploratory data analysis
c. predictive modeling
d. Data reporting
Detecting missing values - Answer An analyst has been tasked with defining data
columns that could contain null values. Which activity of the data acquisition phase is
represented?
a. collecting data
b. disqualifying data sources
c. detecting missing values
d. transforming improperly formatted text
Cleaning Data - Answer Which activity in the data analytics life cycle occurs during the
data acquisition phase and requires the most time and effort from the data analyst?
a. selecting the data sources
b. importing data into a database
c. cleaning data
defining goals
The SQL queries of data within the tables - Answer What might be developed by data
analysts when acquiring data from a data warehouse?
a.The procedures for extracting files from the data warehouse
b. The procedures for updating tables in the data warehouse
c. The relational structure of tables
, d. The SQL queries of data within the tables
Interquartile range - Answer What can be identified using a box plot?
a. frequency
b. correlation
c. interquartile range
d. mean
The analyst will lack insight into the structure of the data set. - Answer What will be a
consequence of poor attention to detail during the data exploration phase?
a. Not enough variables will be considered in the analysis.
b. The outcome of the analysis will be misaligned to business needs.
c. The analyst will lack insight into the structure of the data set.
d. The model will be built using the wrong data set.
Verification through visualization - Answer Which aspect of data exploration occurs
when an analyst writes code to compile a bar graph of dog food sales per month?
a. Performance of a correlation analysis
b. Analysis of data anomalies
c. Verification through visualization
d. Determination of variabilities
To minimize interruptions from maintenance shutdowns - Answer How does the
predictive model serve this oil company?
a. To minimize interruptions from maintenance shutdowns
b. To minimize the need for workforce safety training
c. To improve compliance with pipeline construction standards
d. To improve compliance with pipeline disposal standards
predictive analysis - Answer During which phase in the data analytics life cycle would a
churn analysis be performed?
a. data cleaning
b. data acquisition
c. predictive analysis
d. representation and reporting
The model is developed before the research question is known. - Answer Which
mistake is commonly made during the predictive analytics phase?
a. The data are separated into different sets.
b. The variables are separated into response and independent variables.
c. The data are prepared before the model is developed.
d. The model is developed before the research question is known.
Too little data for training and testing data sets - Answer Why might a data analyst
resample a data set with replacement data in a data mining project?
a. Misidentification of causation due to correlation
Identifying business needs - Answer Which activity does an analyst perform in the
discovery phase of the data analytics life cycle?
a. Collecting Data
b. Cleaning Data
c. Identifying outliers
d. Identifying business needs
Data Exploration - Answer In which phase of the data analytics life cycle does an
analyst build a histogram?
a. Data acquisition
b. Data exploration
c. Discovery
d. Predictive modeling
Exploratory data analysis - Answer An analyst applies a statistical formula to obtain the
average temperature for a city over the last 50 years. Which phase of the data analytics
life cycle is represented by this activity?
a. Data acquisition
b. Exploratory data analysis
c. predictive modeling
d. Data reporting
Detecting missing values - Answer An analyst has been tasked with defining data
columns that could contain null values. Which activity of the data acquisition phase is
represented?
a. collecting data
b. disqualifying data sources
c. detecting missing values
d. transforming improperly formatted text
Cleaning Data - Answer Which activity in the data analytics life cycle occurs during the
data acquisition phase and requires the most time and effort from the data analyst?
a. selecting the data sources
b. importing data into a database
c. cleaning data
defining goals
The SQL queries of data within the tables - Answer What might be developed by data
analysts when acquiring data from a data warehouse?
a.The procedures for extracting files from the data warehouse
b. The procedures for updating tables in the data warehouse
c. The relational structure of tables
, d. The SQL queries of data within the tables
Interquartile range - Answer What can be identified using a box plot?
a. frequency
b. correlation
c. interquartile range
d. mean
The analyst will lack insight into the structure of the data set. - Answer What will be a
consequence of poor attention to detail during the data exploration phase?
a. Not enough variables will be considered in the analysis.
b. The outcome of the analysis will be misaligned to business needs.
c. The analyst will lack insight into the structure of the data set.
d. The model will be built using the wrong data set.
Verification through visualization - Answer Which aspect of data exploration occurs
when an analyst writes code to compile a bar graph of dog food sales per month?
a. Performance of a correlation analysis
b. Analysis of data anomalies
c. Verification through visualization
d. Determination of variabilities
To minimize interruptions from maintenance shutdowns - Answer How does the
predictive model serve this oil company?
a. To minimize interruptions from maintenance shutdowns
b. To minimize the need for workforce safety training
c. To improve compliance with pipeline construction standards
d. To improve compliance with pipeline disposal standards
predictive analysis - Answer During which phase in the data analytics life cycle would a
churn analysis be performed?
a. data cleaning
b. data acquisition
c. predictive analysis
d. representation and reporting
The model is developed before the research question is known. - Answer Which
mistake is commonly made during the predictive analytics phase?
a. The data are separated into different sets.
b. The variables are separated into response and independent variables.
c. The data are prepared before the model is developed.
d. The model is developed before the research question is known.
Too little data for training and testing data sets - Answer Why might a data analyst
resample a data set with replacement data in a data mining project?
a. Misidentification of causation due to correlation
