Data Collection and Pre-Processing Quiz

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• It provides outdated information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• Data can be outdated or inaccurate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