On news sites like the new york times or the wall street journal the domain end with .com
The purpose of the domain name : it serves to identify internet resources such as computers networks and services with a text-based label that is easier to memorize than the numerical addresses used in internet protocols.
For humans, it's much easier to remember the address of a Web site using a name rather than an IP address. IPV4 addresses were complicated but nothing compared to IPv6 addresses . So, we came with the idea of using this central database that keeps the relationships between domain names and IP addresses. Also, if the Web site changes address (or host), that is completely transparent to the user because he doesn't know (nor care!) what's the site's address.
Validity analysis will tell us whether the predictor is actually measuring the variables at hand or not. Hence there will be a need for us to test the validity of the predictor as this will guide us into having the required results.
