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• Can provide up-to-date and real-time information.
Some disadvantages of Primary data are as follows:
• Often time-consuming and expensive.
• Requires careful planning and design to avoid biases.
Secondary source of data
Secondary data is data that has already been collected, processed, and published by other
individuals or organisations. Researchers use this data for new analysis or to supplement primary
data.
Examples of secondary data sources include:
• Books and academic journals: Published research studies and scholarly articles.
• Government reports: Census data, economic statistics, health records, and official publications.
• Websites and online databases: Public datasets, industry reports, open data portals like
Kaggle or WHO.
• Newspapers and magazines: Articles and reports on current events and trends.
• UCI is a collection of
• Countries like databases, domain
Australia, EU, India, theories, and data
New Zealand, and generators in
Singapore are openly collaboration with
sharing datasets on Dataset Search the University of
various portals
Massachusetts
• Kaggle is an online • This is a toolbox
community of data .gov by Google that can UCI
scientists where you
can access different datasets search for data by Machine Learning Repository
name
types of data
Some advantages of secondary source data are as follows:
• Easily accessible and often free or low-cost.
• Saves time as data collection is already done.
• Useful for historical or trend analysis.
Some disadvantages of secondary source data are as follows:
• May not perfectly fit the current research question.
• Possible issues with accuracy, reliability, or outdatedness.
• Lack of control over data quality and collection methods.
Stages of AI Project Cycle 37

