Fields of Anthropology. There are now four major fields of anthropology: biological anthropology, cultural anthropology, linguistic anthropology, and archaeology. Each focuses on a different set of research interests and generally uses different research techniques.
SPC is one of the three categories of Statistical Quality Control (SQC). SQC is a statistical method of analyzing variations in the manufacturing process in order to make it better and more effective. Only a certain number of samples are needed to determine whether the products are acceptable.
STC stands for sound transmission class and is measured to calculate the effectiveness of soundproofing materials in reducing sound transmission between rooms. STC is decibels (dB) reduction in noise a material/ partition can provide.