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DSCI 304 Exam 1 Questions And Answers.
DSCI 304 Exam 1 Questions And Answers. 
 
 
Every business is managed through what three major functions? - CORRECT ANSWER Finance, marketing, and operations management 
 
Operations management is - CORRECT ANSWER The business function that plans, organizes, coordinates, and controls the resources needed to produce a company's goods and services 
 
What must operations management achieve in order to be successful? - CORRECT ANSWER Add value during the transformation process 
 
In a pure se...
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DSCI 304 Exam 1 Questions And Answers. 
 
 
Every business is managed through what three major functions? - CORRECT ANSWER Finance, marketing, and operations management 
 
Operations management is - CORRECT ANSWER The business function that plans, organizes, coordinates, and controls the resources needed to produce a company's goods and services 
 
What must operations management achieve in order to be successful? - CORRECT ANSWER Add value during the transformation process 
 
In a pure se...
![](/docpics/7240098/67ac7228a1f69_7240098_121_171.jpeg)
DSCI 4520 PRACTICE EXAM QUESTIONS AND ANSWERS.
DSCI 4520 PRACTICE EXAM QUESTIONS AND ANSWERS. 
 
 
The ultimate goal of business analytics is to develop more complicated methods and technologies. - CORRECT ANSWER False 
 
The course has two exams. Both are open book and the second one is held during the week of university finals. - CORRECT ANSWER False 
 
Which of the following is (are) step(s) in the data mining process? - CORRECT ANSWER All of the Above 
Interpretation/Reporting 
Data preparation 
Analysis and Evaluation 
 
Which of the...
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DSCI 4520 PRACTICE EXAM QUESTIONS AND ANSWERS. 
 
 
The ultimate goal of business analytics is to develop more complicated methods and technologies. - CORRECT ANSWER False 
 
The course has two exams. Both are open book and the second one is held during the week of university finals. - CORRECT ANSWER False 
 
Which of the following is (are) step(s) in the data mining process? - CORRECT ANSWER All of the Above 
Interpretation/Reporting 
Data preparation 
Analysis and Evaluation 
 
Which of the...
![](/docpics/7240030/67ac7072d9425_7240030_121_171.jpeg)
DSCI Exam 2 Practice Exam Questions & Answers.
DSCI Exam 2 Practice Exam Questions & Answers. 
 
 
too small values of k - CORRECT ANSWER What can cause the over-fitting problem in k-NN classifiers? 
 
too large values of k 
too small values of k 
splitting the data set 
incorrect distance function 
 
False - CORRECT ANSWER The main difference between k-NN classifiers and k-NN regression models is that the former does not need a distance function, while the latter uses the Euclidean distance function. 
 
True 
False 
 
Majority vote determ...
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DSCI Exam 2 Practice Exam Questions & Answers. 
 
 
too small values of k - CORRECT ANSWER What can cause the over-fitting problem in k-NN classifiers? 
 
too large values of k 
too small values of k 
splitting the data set 
incorrect distance function 
 
False - CORRECT ANSWER The main difference between k-NN classifiers and k-NN regression models is that the former does not need a distance function, while the latter uses the Euclidean distance function. 
 
True 
False 
 
Majority vote determ...
![](/docpics/7240002/67ac6fbf31f8e_7240002_121_171.jpeg)
DSCI 5350 Exam 1 Question 2 Correctly Answered.
DSCI 5350 Exam 1 Question 2 Correctly Answered. 
 
 
The 3Vs in the definition of Big Data stand for: 
 
A: Volume, Value, Veracity 
B: Volume, Variety, Value 
C: Volume, Variety, Velocity - CORRECT ANSWER C: Volume, Variety, Velocity 
 
The four stages in Big Data adoption identified by the 2012 IBM/University of Oxford report DO NOT include: 
 
A: Educate 
B: Expect 
C: Engage 
D: Execute - CORRECT ANSWER B: Expect 
 
The main sponsor(s) in the "Execute" stage of big data adoption is/a...
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DSCI 5350 Exam 1 Question 2 Correctly Answered. 
 
 
The 3Vs in the definition of Big Data stand for: 
 
A: Volume, Value, Veracity 
B: Volume, Variety, Value 
C: Volume, Variety, Velocity - CORRECT ANSWER C: Volume, Variety, Velocity 
 
The four stages in Big Data adoption identified by the 2012 IBM/University of Oxford report DO NOT include: 
 
A: Educate 
B: Expect 
C: Engage 
D: Execute - CORRECT ANSWER B: Expect 
 
The main sponsor(s) in the "Execute" stage of big data adoption is/a...
![](/docpics/7239976/67ac6ee3752e0_7239976_121_171.jpeg)
DSCI 5240 - Exam 1 - Set 2 Questions & Answers.
DSCI 5240 - Exam 1 - Set 2 Questions & Answers. 
 
 
Regression is using __________ rather than _________ values - CORRECT ANSWER predicted, actual 
 
Exploratory Data Analysis (EDA) - CORRECT ANSWER "an approach that attempts to develop an understanding of the data to facilitate the selection of the best possible models 
 
-Maximize insight into a data set 
 
-Uncover underlying structure 
 
-Extract important variables 
 
-Detect outliers and anomalies 
 
-Test underlying assumptions ...
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DSCI 5240 - Exam 1 - Set 2 Questions & Answers. 
 
 
Regression is using __________ rather than _________ values - CORRECT ANSWER predicted, actual 
 
Exploratory Data Analysis (EDA) - CORRECT ANSWER "an approach that attempts to develop an understanding of the data to facilitate the selection of the best possible models 
 
-Maximize insight into a data set 
 
-Uncover underlying structure 
 
-Extract important variables 
 
-Detect outliers and anomalies 
 
-Test underlying assumptions ...
![](/docpics/7233367/67ab5f49de469_7233367_121_171.jpeg)
DSCI 4330 Exam 1 Questions with Detailed Answers.
DSCI 4330 Exam 1 Questions with Detailed Answers. 
 
 
BI represents a bold new paradigm in which the company's business strategy must be aligned to its business intelligence analysis initiatives. T/F - CORRECT ANSWER FALSE 
 
The very design that makes an OLTP system efficient for transaction processing makes it inefficient for - CORRECT ANSWER end-user ad hoc reports, queries, and analysis. 
 
In the Opening Vignette on Sports Analytics, what type of modeling was used to predict offensive...
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DSCI 4330 Exam 1 Questions with Detailed Answers. 
 
 
BI represents a bold new paradigm in which the company's business strategy must be aligned to its business intelligence analysis initiatives. T/F - CORRECT ANSWER FALSE 
 
The very design that makes an OLTP system efficient for transaction processing makes it inefficient for - CORRECT ANSWER end-user ad hoc reports, queries, and analysis. 
 
In the Opening Vignette on Sports Analytics, what type of modeling was used to predict offensive...
![](/docpics/7233323/67ab5e10438ec_7233323_121_171.jpeg)
DSCI Practice Exam 1 MC Questions & Answers.
DSCI Practice Exam 1 MC Questions & Answers. 
 
 
Which of the following is not part of the management science approach to problem solving? 
 
 Observation 
 
 Problem definition 
 
 Model construction 
 
 Function analysis - CORRECT ANSWER Function analysis 
 
Management science is a: 
 
Collection of problems. 
 
Collection of techniques. 
 
Logical approach to problem solving. 
 
Data collection procedure. - CORRECT ANSWER Logical approach to problem solving. 
 
Management Science is: 
 
 
...
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DSCI Practice Exam 1 MC Questions & Answers. 
 
 
Which of the following is not part of the management science approach to problem solving? 
 
 Observation 
 
 Problem definition 
 
 Model construction 
 
 Function analysis - CORRECT ANSWER Function analysis 
 
Management science is a: 
 
Collection of problems. 
 
Collection of techniques. 
 
Logical approach to problem solving. 
 
Data collection procedure. - CORRECT ANSWER Logical approach to problem solving. 
 
Management Science is: 
 
 
...
![](/docpics/7233301/67ab5d2de6b05_7233301_121_171.jpeg)
DSCI FINAL EXAM PREP QUESTIONS.
DSCI FINAL EXAM PREP QUESTIONS. 
 
 
In a confusion matrix, the main diagonal elements represent the number of correct predictions made by the model for each class. - CORRECT ANSWER True 
 
What is the sensitivity score of the following confusion matrix given that "1" is positive? (rounded to 2 decimal places) - CORRECT ANSWER 0.71 
 
What is the error rate of the following confusion matrix? (rounded to 2 decimal places) - CORRECT ANSWER 0.41 
 
A model with a lower AUC (Area Under the ...
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DSCI FINAL EXAM PREP QUESTIONS. 
 
 
In a confusion matrix, the main diagonal elements represent the number of correct predictions made by the model for each class. - CORRECT ANSWER True 
 
What is the sensitivity score of the following confusion matrix given that "1" is positive? (rounded to 2 decimal places) - CORRECT ANSWER 0.71 
 
What is the error rate of the following confusion matrix? (rounded to 2 decimal places) - CORRECT ANSWER 0.41 
 
A model with a lower AUC (Area Under the ...
![](/docpics/7233274/67ab5c5f3397a_7233274_121_171.jpeg)
DSCI 5350 WRITTEN EXAM QUESTIONS AND ANSWERS.
DSCI 5350 WRITTEN EXAM QUESTIONS AND ANSWERS. 
 
 
In the R statement below, df is a _____ 
df <- ("c:temp/") 
A. variable 
B. vector 
C. data file 
D. data frame - CORRECT ANSWER D. data frame 
 
The R statement plot(countries$PCGDP, countries$PiracyRate) produces: 
A. A time series plot of variable PCGDP and a time series plot of variable PiracyRate 
B. A scatterplot of variable PiracyRate versus variable PCGDP 
C. A scatterplot of PCGDP vs. countries and a scatterplot of PiracyRa...
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DSCI 5350 WRITTEN EXAM QUESTIONS AND ANSWERS. 
 
 
In the R statement below, df is a _____ 
df <- ("c:temp/") 
A. variable 
B. vector 
C. data file 
D. data frame - CORRECT ANSWER D. data frame 
 
The R statement plot(countries$PCGDP, countries$PiracyRate) produces: 
A. A time series plot of variable PCGDP and a time series plot of variable PiracyRate 
B. A scatterplot of variable PiracyRate versus variable PCGDP 
C. A scatterplot of PCGDP vs. countries and a scatterplot of PiracyRa...
![](/docpics/7233242/67ab5b053fc0d_7233242_121_171.jpeg)
DSCI 100 Study Guide Exam Questions Correctly Answered.
DSCI 100 Study Guide Exam Questions Correctly Answered. 
 
 
Underfitting in classification - CORRECT ANSWER Increased number of neighbours means that more observations are influencing the classification. This smooths out the boundaries between each class, so the model isn't influenced enough by the training data. 
 
Underfitting in KNN regression - CORRECT ANSWER Increased K values means that more observations are influencing the regression line, which can cause the line to become flat. Si...
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DSCI 100 Study Guide Exam Questions Correctly Answered. 
 
 
Underfitting in classification - CORRECT ANSWER Increased number of neighbours means that more observations are influencing the classification. This smooths out the boundaries between each class, so the model isn't influenced enough by the training data. 
 
Underfitting in KNN regression - CORRECT ANSWER Increased K values means that more observations are influencing the regression line, which can cause the line to become flat. Si...
Ms2 NEURO Exam Questions Correctly Answered.
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