Question: 1. Define the distinctions between primary, secondary, and tertiary sources in a secondary search.
2. What problems of secondary data quality must researchers face? How can they deal with them?
3. In May 2007, TJX Co., the parent company of T.J.Maxx and other retailers, announced in a Securities and Exchange Commission fi ling that more than 45 million credit and debit card numbers had been stolen from its IT systems. The company had taken some measures over a period of a few years to protect customer data through obfuscation and encryption. But TJX didn't apply these policies uniformly across its IT systems. As a result, it still had no idea of the extent of the damage caused by the data breach. If you were TJX, what data-mining research could you do to evaluate the safety of your customer's personal data?