HP provides a type of model name near the keyboard or screen, but this name or number is probably not sufficient to get proper support for your computer. These names or numbers often represent a series of many notebook computers that look similar, but have different options and parts.
Fundamentally, river sampling is a web-based convenience sample of opt-in participants that uses a quota sampling approach to build a study sample. The selection method is not probability based, and participants cannot be described as representing any larger defined population.
The only river sample used is a DMS River Sample Â® , whose methods are proprietary and thus not described. The online comparative samples are an aggregate of a DMS panel sample, again with undisclosed proprietary methods, and two other unnamed online panel samples with no disclosure of their methods for recruitment.