Quiz #2_ IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
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Northeastern University *
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Course
7275
Subject
Industrial Engineering
Date
Jan 9, 2024
Type
Pages
8
Uploaded by CorporalApeMaster58
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
1/8
Quiz #2
Due
Feb 22, 2021 at 12:15pm
Points
100
Questions
10
Available
Feb 22, 2021 at 11:45am - Feb 22, 2021 at 12:15pm
30 minutes
Time Limit
15 Minutes
Instructions
This quiz was locked Feb 22, 2021 at 12:15pm.
Attempt History
Attempt
Time
Score
LATEST
Attempt 1
15 minutes
90 out of 100
Correct answers are hidden.
Score for this quiz:
90
out of 100
Submitted Feb 22, 2021 at 12pm
This attempt took 15 minutes.
This is a close book, close note Quiz, covering chapter 1-4. You must complete it in one sitting within 15
minutes. Follow all University Ethical Standards.
10 / 10 pts
Question 1
Which one of the following is NOT a way to deal with missing values:
Conducting new measurements
Replacing the missing values with imputed values
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
2/8
Omi±ing the observations with missing values
Clustering the variables
Correct!
10 / 10 pts
Question 2
What type of data analytics represents examining data to find the cause of an event
or symptom?
Diagnostic analytics
Descriptive analytics
Prescriptive analytics
Predictive analytics
Correct!
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
3/8
10 / 10 pts
Question 3
Which one of the following statements is CORRECT?
The goal of unsupervised learning is to predict an outcome variable
Data exploration is one of the supervised learning methods
In a prediction problem, we are trying to predict the value of a nominal
variable
In a classification problem, we are trying to predict the value of a
categorical variable
Correct!
10 / 10 pts
Question 4
From the covariance matrix of two variables
we conclude that the two variables have a CORRELATION COEFFICIENT
of
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1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
4/8
-1/6
-1/27
-1/3
-2/3
Correct!
10 / 10 pts
Question 5
Principal Component Analysis (PCA)
is used
For converting a categorical variable to a numerical variable
For dimension reduction when subsets of numerical variables are highly
correlated
For reducing the number of categories in categorical variables
For dimension reduction when subsets of categorical variables are highly
correlated
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
5/8
Correct!
0 / 10 pts
Question 6
Incorrect
Incorrect
Given the covariance matrix of two numerical variables
We perform a PCA analysis on the two numerical variables and conclude that the
VARIANCES of the two principal components are:
6 and 4, respectively
6 and 1, respectively
6 and 3, respectively
6 and 2, respectively
Wrong!
10 / 10 pts
Question 7
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
6/8
Which of the following is a distribution plot?
None of them
(b)
(c)
(a)
Correct!
10 / 10 pts
Question 8
Which one of the following terms describes an input variable?
A predicted class
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1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
7/8
A predicted numerical value
A variable that represents
target value
or
desired outcome
A variable that acts as a
feature
or
predictor
Correct!
10 / 10 pts
Question 9
Which of the following statements is CORRECT?
In a prediction problem, we are trying to predict the value of a nominal
variable
The goal of unsupervised learning is to predict an outcome variable
Another term used for dependent variable is output variable
Data exploration is one of the supervised learning methods
1/19/22, 12:36 PM
Quiz #2: IE7275 33670 Data Mining in Engineering SEC 02 Spring 2021 [BOS-2-TR]
https://northeastern.instructure.com/courses/64117/quizzes/310947
8/8
Correct!
10 / 10 pts
Question 10
Validation data is:
The data used to assess the predictive performance of the selected
model
The data used to train a model or models
The data used by the Quality Assurance group
The data used to predict/classify during operational phase using the
selected model
Correct!
Quiz Score:
90
out of 100