Data Cleaning Techniques

What is data cleaning?

• A process to improve data quality

• A method to analyze data

• A technique to visualize data

• A way to store data

What is the purpose of identifying and removing duplicate entries?

• To ensure each observation appears once

• To increase data size

• To enhance data visualization

• To improve data storage

What are the methods for handling missing values?

• Imputation and deletion

• Visualization and analysis

• Storage and retrieval

• Cleaning and formatting

What is the goal of correcting typographical errors?

• To ensure consistency in data entries

• To increase data size

• To enhance data visualization

• To improve data storage

What does data normalization involve?

• Standardizing data formats

• Increasing data size

• Visualizing data

• Storing data efficiently

What is the purpose of data transformation?

• To make data suitable for statistical analysis

• To increase data size

• To enhance data visualization

• To improve data storage

What is the method for detecting outliers?

• Visual analysis using boxplots

• Increasing data size

• Storing data efficiently

• Cleaning and formatting

What is data validation?

• Ensuring all entries meet certain criteria

• Increasing data size

• Enhancing data visualization

• Improving data storage

What is the significance of data profiling?

• To improve data storage

• To assess the quality and structure of data

• To enhance data visualization

• To increase data size

What does data aggregation refer to?

• Increasing data size

• Visualizing data

• Storing data efficiently

• Combining data from multiple sources