Podcast
Questions and Answers
What does the term 'data source' primarily refer to in this context?
What does the term 'data source' primarily refer to in this context?
- The individuals responsible for data analysis
- The technology used to generate data
- The location where data originates (correct)
- The format in which data is stored
Why is it important to know the ownership of a dataset?
Why is it important to know the ownership of a dataset?
- To understand the ethical implications of data use (correct)
- To determine the necessary software tools
- To ensure the cooking process is followed
- To verify the dataset's format
What role do subject matter experts play in handling data?
What role do subject matter experts play in handling data?
- They generate the data or manage the datasets (correct)
- They analyze the data for insights
- They determine the financial investment in the data
- They create the visualizations from the data
What must a data professional do first when given a dataset?
What must a data professional do first when given a dataset?
Which question is NOT relevant when assessing the reliability of a data source?
Which question is NOT relevant when assessing the reliability of a data source?
How can understanding data sources impact data storytelling?
How can understanding data sources impact data storytelling?
Which aspect is NOT included in determining the data source?
Which aspect is NOT included in determining the data source?
What is one of the main purposes of identifying data sources in EDA?
What is one of the main purposes of identifying data sources in EDA?
What advantage do tabular files offer when organizing data?
What advantage do tabular files offer when organizing data?
Which data format is primarily composed of rows of text and numbers separated by commas?
Which data format is primarily composed of rows of text and numbers separated by commas?
What is one of the primary uses of Structured Query Language (SQL) in relation to databases?
What is one of the primary uses of Structured Query Language (SQL) in relation to databases?
What type of data is characterized as first-party data?
What type of data is characterized as first-party data?
What distinguishes JSON files from other data formats?
What distinguishes JSON files from other data formats?
When would you typically need to reach out to data owners or project stakeholders?
When would you typically need to reach out to data owners or project stakeholders?
What is a key benefit of using CSV files?
What is a key benefit of using CSV files?
Which of the following correctly describes third-party data?
Which of the following correctly describes third-party data?
What types of data do data professionals typically work with?
What types of data do data professionals typically work with?
What is the primary purpose of understanding the data file format?
What is the primary purpose of understanding the data file format?
Why might a data professional need customer purchase data from multiple years?
Why might a data professional need customer purchase data from multiple years?
Which of the following file types does NOT typically allow for nested objects?
Which of the following file types does NOT typically allow for nested objects?
What is an example of second-party data?
What is an example of second-party data?
Flashcards
Data Source
Data Source
The location where data originates, like a database, file, or API. This helps identify who created it and how reliable it is.
Subject Matter Experts (SMEs)
Subject Matter Experts (SMEs)
Individuals with expertise on the data, who can answer questions about its quality and meaning. They might be engineers, analysts, or database administrators.
Data Collection Methods
Data Collection Methods
Understanding how the data is collected provides insight into potential biases and limitations. This crucial for assessing its quality and reliability.
Data Formats
Data Formats
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Data Types
Data Types
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Project Plan
Project Plan
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Exploratory Data Analysis (EDA)
Exploratory Data Analysis (EDA)
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Data Reliability
Data Reliability
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First-party data
First-party data
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Second-party data
Second-party data
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Third-party data
Third-party data
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CSV file
CSV file
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JSON file
JSON file
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Tabular file
Tabular file
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Database (DB)
Database (DB)
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Data file format
Data file format
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Missing values
Missing values
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Understanding Data Sources
Understanding Data Sources
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Best format for data
Best format for data
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Types of data
Types of data
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Evaluating data alignment
Evaluating data alignment
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Communicating data issues
Communicating data issues
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Study Notes
Data Discovery in EDA: Raw Ingredients
- Data discovery in exploratory data analysis (EDA) is analogous to preparing a meal from a recipe.
- The project plan is the recipe, and the dataset is the raw ingredients.
- Data professionals need to understand the data's source, format, types, and how it was collected to ensure reliable and ethical analysis.
Data Source
- Data source: The location where data originates.
- Essential to identify data owners and subject matter experts (SMEs).
- Data owners' expertise and financial stakes impact data reliability.
- Understanding collection methods (e.g., computer systems, databases, manual entry) helps interpret collected data.
- Missing values have various causes (e.g., data disclosure issues, lagging data, system errors).
Data File Formats
- Common formats include tabular files (like Excel), CSV, XML, spreadsheets, database files (DB), and JSON.
- Tabular files organize data in rows and columns, aiding pattern identification.
- CSV files are simple text files separated by delimiters (e.g., commas).
- Database files are structured for storage, search, and often require SQL knowledge.
- JSON files are data storage in JavaScript format, potentially containing nested objects.
Data Types
- Types include first-party (internal), second-party (external direct), and third-party (aggregated external).
- Understanding data type helps in determining how to address issues (e.g., missing values).
- Other types include geographic, demographic, numeric, time-based, financial, and qualitative data.
Data Alignment and Workflow
- Data must align with the project plan and pace workflow.
- Sufficient data is necessary to complete the project.
- Addressing discrepancies (insufficient data, wrong type) involves contacting data owners and project stakeholders.
- Data professionals should proactively manage data to guarantee a successful outcome. (e.g., requesting additional data if insufficient).
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