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Data collection and preprocessing

1. Which of the following is an example of raw data?

original swath files generated from a sonar system
initial time-series file of temperature values
a real-time GPS-encoded navigation file
all of the mentioned
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Answer is Wrong!

Detailed SolutionWhich of the following is an example of raw data?

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2. Which of the following process involves structuring datasets to facilitate analysis?

Data tidying
Data mining
Data booting
All of the mentioned
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Answer is Wrong!

Detailed SolutionWhich of the following process involves structuring datasets to facilitate analysis?

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3. What is the term for the process of reducing the dimensionality of data while retaining its most important features?

Data Imputation
Data Scaling
Data Reduction
Data Normalization
Answer is Right!
Answer is Wrong!

Detailed SolutionWhat is the term for the process of reducing the dimensionality of data while retaining its most important features?

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4. Which data collection method involves manipulating one or more variables to observe their effects on other variables?

Observational Studies
Experiments
Surveys
Interviews
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Detailed SolutionWhich data collection method involves manipulating one or more variables to observe their effects on other variables?

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5. Which of the following function is used to read data off the webpages?

read.web
read.Lines
read.Line
all of the mentioned
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Answer is Wrong!

Detailed SolutionWhich of the following function is used to read data off the webpages?

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6. Which of the following metacharacter is used to refer to any character?

%
@
.
All of the mentioned
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Detailed SolutionWhich of the following metacharacter is used to refer to any character?

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7. Following figure represents correct sequence of steps in performing data analysis.

TRUE
nan
nan
nan
Answer is Right!
Answer is Wrong!

Detailed SolutionFollowing figure represents correct sequence of steps in performing data analysis.

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8. What is the term for the process of converting data into a structured format suitable for analysis and storage?

Data Integration
Data Transformation
Data Wrangling
Data Cleaning
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Detailed SolutionWhat is the term for the process of converting data into a structured format suitable for analysis and storage?

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9. Extracting XML is the basis for most web scraping.

TRUE
nan
nan
nan
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Answer is Wrong!

Detailed SolutionExtracting XML is the basis for most web scraping.

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10. Point out the correct statement.

Nearly 80% of data analysis is spent on wrangling data
Nearly 20% of data analysis is spent on data dredging
Nearly 80% of data analysis is spent on the cleaning and preparing data
None of the mentioned
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Answer is Wrong!

Detailed SolutionPoint out the correct statement.

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