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ISYE 6501-MIDTERM 2 EXAM
|ACTUAL COMPLETE EXA M
QUESTIONS AND CORREC T
ANSWERS (VERIFIED AN SWERS )
ALREADY GRADED A+.
Question : Which Of These Is Time Series Data?
(a) The Average Cost Of A House In The United States Every Year Since 1820 (b) The Height Of Each Professional Basketball Player In The Nba At The Start Of The Season
Correct Answer: (a)
Question : Which Of These Is Structured Data?
(a) The Contents Of A Person'S Twitter Feed (b) The Amount Of Money In A Person'S Bank Account
Correct Answer: (b)
Question : A Survey Of 25 People Recorded Each
Person'S Family Size And Type Of Car. Which Of These Is A Data Point?
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(a) The 14th Person'S Family Size And Car Type (b) The 14th Person'S Family Size (c) The Car Type Of Each Person
Correct Answer: (a) A Data Point Is All The Information
About One Observation
Question : Which Of These Is Generally A Good Reason
To Remove An Outlier From Your Data Set?(a) The Outlier Is An Incorrectly-Entered Data, Not Real Data.(b) Outliers Like This Only Happen Occasionally.
Correct Answer: (a) If The Data Point Isn'T A True One,
You Should Remove It From Your Data Set.
Question : What Do Descriptive Questions Ask?
Correct Answer: What Happened? (E.G., Which
Customers Are Most Alike)
Question : What Do Predictive Questions Ask?
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Correct Answer: What Will Happen? (E.G., What Will
Google'S Stock Price Be?)
Question : What Do Prescriptive Questions Ask?
Correct Answer: What Action(S) Would Be Best? (E.G.,
Where To Put Traffic Lights)
Question : What Is A Model?
Correct Answer: Real-Life Situation Expressed As
Math.
Question : What Do Classifiers Help You Do?
Correct Answer: Differentiate
Question : What Is A Soft Classifier And When Is It
Used?
Correct Answer: In Some Cases, There Won'T Be A
Line That Separates All Of The Labeled Examples. So We Use A Classifier That Minimizes The Number Of Mistakes.
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Question : What Does It Mean When The
Classifier/Decision Boundary Is Almost Parallel To The Vertical X-Axis?
Correct Answer: The Horizontal Attribute Is All That Is
Needed.
Question : What Does It Mean When The
Classifier/Decision Boundary Is Almost Parallel To The Horizontal Y-Axis?
Correct Answer: The Vertical Attribute Is All That Is
Needed.
Question : What Is Time-Series Data?
Correct Answer: The Same Data Recorded Over Time
Often Recorded At Equal Intervals