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 importance of appropriate sampling. Food sampling concerns the selection of the individual units of food, food products or bulk foodstuffs from the food supply or source, whether it be from the land, market place, manufacturing/food outlet or from the homes of the members of the study population (field sample).