WorksheetsData Collection and Pre-Processing Quiz
Total questions: 10
Worksheet time: 5mins
What is the main objective of data collection?
To store data in databases
To visualize data patterns
To create complex algorithms
To gather information-rich and reliable data
Which of the following is a primary data collection method?
Library records
Government archives
Historical data
Internet surveys
What does data cleaning involve?
Removing duplicates and fixing incorrect data
Collecting data from various sources
Analyzing data trends
Storing data in cloud services
Which method is used for data integration?
Conducting interviews
Merging multiple data frames
Creating pivot tables
Performing statistical analysis
What is the purpose of data transformation?
To collect data from external sources
To convert data into a machine learning digestible format
To store data securely
To visualize data using graphs
Which of the following describes skewness?
A type of data integration
A method for data cleaning
A measure of symmetry in distribution
A statistical analysis technique
What does a box plot summarize?
Data using median and quartiles
Data using mean and standard deviation
Data using frequency distribution
Data using correlation coefficients
Which of the following is a disadvantage of primary data collection?
It is easily accessible
It is cost-effective
It is time-consuming
It provides outdated information
What is the main challenge of secondary data collection?
It is time-consuming
It is always cost-effective
It requires extensive interviews
Data can be outdated or inaccurate
What does a heat map represent?
A type of data integration
A method for data cleaning
A statistical summary of data
A two-dimensional representation of information with colors
