D204 Practice Exam with 100% correct
answers 2025
Which statistical technique should be used to draw conclusions about an entire population based on
a representative sample?
A. Correlation
B. Bayes theorem
C. Hypothesis testing
D. Measures of central tendency - answer-C
What is an example of random sampling of college students?
A. Surveying students chosen arbitrarily from around the entire college campus
B. Surveying every student in the college library
C. Surveying students chosen arbitrarily in the library of the university
D. Surveying every student on campus - answer-A
Which type of analysis would be used to predict a binary outcome based on a set of independent
variables?
A. Hypothesis testing
B. Descriptive statistics
C. Regression
D. Time Series - answer-C
Which type of data analysis is appropriate if the goal is to minimize the cost of a diet, using a data
set consisting of the following variables: protein content, fat content, and cost per unit?
A. Decision trees
B. Calculus
C. Optimization
D. Bayes' theorem - answer-C
,D204 Practice Exam with 100% correct
answers 2025
Which technique can be used to determine the likelihood that a positive diagnostic test result
indicates whether the disease is actually present?
A. Bayes' theorem
B. Central limit theorem
C. Regression
D. Optimization - answer-A
Which concept should be considered when choosing variables for inclusion in a linear regression
model?
A. Feasibility of merging the variables
B. Feasibility of controlling the variables
C. Feasibility of testing the variables
D. Feasibility of classifying the variables - answer-B
A neural network algorithm in machine learning endeavors to recognize underlying relationships in a
set of data.
What does this process mimic?
A. The way a computer processes data
B. The way the human brain operates
C. The way architects establish functionality
D. The way that social media builds networks - answer-B
Which characteristics are used to group data together in a cluster analysis?
Choose 2 answers.
A. Distance
, D204 Practice Exam with 100% correct
answers 2025
B. Similarity
C. Shape
D. Size - answer-A & B
Which tool has libraries that expand its visualization capabilities?
A. Python
B. Tableau
C. Adobe Infographics
D. D3.js - answer-A
Which tools can be used for performing statistics and creating interactive data visualization for large
datasets from various sources?
Choose 2 answers.
A. Gantt Chart
B. SQL
C. Tableau
D. R - answer-C & D
Which type of data representation should a data analyst use to display expense categories as a
percentage of total business expenses?
A. Map visualization
B. Line chart
C. Pie chart
D. Scatter plot - answer-C
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
answers 2025
Which statistical technique should be used to draw conclusions about an entire population based on
a representative sample?
A. Correlation
B. Bayes theorem
C. Hypothesis testing
D. Measures of central tendency - answer-C
What is an example of random sampling of college students?
A. Surveying students chosen arbitrarily from around the entire college campus
B. Surveying every student in the college library
C. Surveying students chosen arbitrarily in the library of the university
D. Surveying every student on campus - answer-A
Which type of analysis would be used to predict a binary outcome based on a set of independent
variables?
A. Hypothesis testing
B. Descriptive statistics
C. Regression
D. Time Series - answer-C
Which type of data analysis is appropriate if the goal is to minimize the cost of a diet, using a data
set consisting of the following variables: protein content, fat content, and cost per unit?
A. Decision trees
B. Calculus
C. Optimization
D. Bayes' theorem - answer-C
,D204 Practice Exam with 100% correct
answers 2025
Which technique can be used to determine the likelihood that a positive diagnostic test result
indicates whether the disease is actually present?
A. Bayes' theorem
B. Central limit theorem
C. Regression
D. Optimization - answer-A
Which concept should be considered when choosing variables for inclusion in a linear regression
model?
A. Feasibility of merging the variables
B. Feasibility of controlling the variables
C. Feasibility of testing the variables
D. Feasibility of classifying the variables - answer-B
A neural network algorithm in machine learning endeavors to recognize underlying relationships in a
set of data.
What does this process mimic?
A. The way a computer processes data
B. The way the human brain operates
C. The way architects establish functionality
D. The way that social media builds networks - answer-B
Which characteristics are used to group data together in a cluster analysis?
Choose 2 answers.
A. Distance
, D204 Practice Exam with 100% correct
answers 2025
B. Similarity
C. Shape
D. Size - answer-A & B
Which tool has libraries that expand its visualization capabilities?
A. Python
B. Tableau
C. Adobe Infographics
D. D3.js - answer-A
Which tools can be used for performing statistics and creating interactive data visualization for large
datasets from various sources?
Choose 2 answers.
A. Gantt Chart
B. SQL
C. Tableau
D. R - answer-C & D
Which type of data representation should a data analyst use to display expense categories as a
percentage of total business expenses?
A. Map visualization
B. Line chart
C. Pie chart
D. Scatter plot - answer-C
Which activity does an analyst perform in the discovery phase of the data analytics life cycle?
