Answers
Descriptive information about opinions and reasons, useful for understanding attitudes and ideas
Information a business already holds, such as sales and customer records
Official data from government sources, often reliable and detailed for analysis
Published information about rivals, like accounts, marketing and customer details
Numerical data such as counts and percentages, useful for measuring trends
Using existing published sources to find information without new data collection
Data already collected by others, used for purposes other than yours
Data collected first-hand by a business to answer a specific research question