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WorksheetsDS: Chapter 2
Total questions: 24
Worksheet time: 2hrs 43mins
How many data type available?
3
2
1
4
What is Structure data?
It’s formatted into systems that have a regular design, fitting into set rows, columns, and table
Has no set organization and doesn’t fit into a defined framework
Combination of structured and unstructured data
What is the advantage of having Structure data?
Easy Access
•Useful for Machine Learning
•Simple Data Mining
Easy scalability
Which of the following is incorrect about the disadvantage of structure data.
Limited Flexibility
Limited storage options
Hard to analyse
Lack of specialized tools
Secure data management is indicate that it can keep the customer information safe even in case of data breach
True
False
Limited Flexibility indicate that it is hard to access the data.
True
False
Which of the following is the Advantage of Unstructured Data.
Native format
Fast data collection
Better insight
Secure data management
Data Collection is the process of gathering the quantitative and NOT qualitative information.
True
False
Data is often collected from multiple sources and usually using a set of standard validated techniques.
True
False
What is the 2 main method of data collection?
Primary data collection
Secondary data collection
Thirdly data collection
What does it mean by Primary data?
Data collected from first-hand experience directly from the main source.
Data collected from other sources
Data collected from internet
Which of the following is not from Primary data.
Interviews
Observations
Surveys
Library
Which of the following is from secondary data collection?
Focus Groups
Open Data
Social Media Data
Libraries
Write down the 6 principles associated with open data.
Public, Accessible, Described, Reusable, Complete, Save time
Public, Accessible, Described, usable, Complete, Timely
Private, Accessible, Described, usable, Complete, Timely
Public, Accessible, Described, Reusable, Complete, Timely
What is the advantage of secondary data collection compared to primary data?
It is much more inexpensive and easier to collect than primary data.
It is much more expensive and hard to collect than primary data.
It save the time to perform data collection
is the process of gathering and measuring information on variables of interest in an established systematic fashion that enables one to answer stated research questions, test hypotheses, and evaluate outcomes.
Data Collection
Survey
presentation
none
this a way to collect data by a series of questions and other prompts to gather information from respondents.
none
interview
Questionnaire
What are the 3 different way to collect of gather data?
Survey
Questionnaire
Simple Random
Survey
Systematic sampling
Interview
Survey
Questionnaire
Cluster Sample
Survey
Questionnaire
Interview
Which of the following is the data collection methods?
Self report (quantitative and qualitative)
Observation (quantitative and qualitative)
Biophysical measures (quantitative)
All answer
Which data collection method best match with following criterial:
- Can be conducted face-to-face, mailed, or even posted on the Internet
- Answers can be yes or no, true or false, multiple choice, and even open-ended questions
- Delayed response and the possibility of ambiguous answers
Questionaire
Survey
Observations
Focus Group
Two main methods of data collection
(a)
The mass of the chocolate cake is 250 g.
qualitative
quantitative
