11. However, secondary data can present problems, too. 12. If secondary data doesn t solve the problem then original data ( primary data ) is sought. 13. Care should be taken to distinguish secondary research from primary research that uses raw secondary data sources. 14. It is also involved in the collection of primary data and the compilation and processing of secondary data . 15. Care must then be taken to ensure that the secondary data source properly reflects regional or national conditions. 16. However, secondary data analysis can be less useful in marketing research, as data may be outdated or inaccurate. 17. Secondary data is data that already exists, such as census data, which can be re-used for the research.18. The Internet is all secondary data , 19. The electrical signaling standards intended for use with RS-449 are DE-9 for the primary and secondary data circuits. 20. Hedonic price regression models are estimated using secondary data on prices and attributes of different product or service alternatives.
