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The idea behind this type of research is to study frequencies, averages, and other statistical calculations. Although this research is highly accurate, it does not gather the causes behind a situation. Descriptive research is mainly done when a researcher wants to gain a better understanding of a topic.
A frequency distribution shows a summarized grouping of data divided into mutually exclusive classes and the number of occurrences in a class. It is a way of showing unorganized data notably to show results of an election, income of people for a certain region, sales of a product within a certain period, student loan amounts of graduates, etc.
For example, in papers reporting on human subjects, typically a table is included giving the overall sample size, sample sizes in important subgroups (e.g., for each treatment or exposure group), and demographic or clinical characteristics such as the average age, the proportion of subjects of each sex, the proportion of subjects with related ...
The use of a sequence of experiments, where the design of each may depend on the results of previous experiments, including the possible decision to stop experimenting, is within the scope of sequential analysis, a field that was pioneered [13] by Abraham Wald in the context of sequential tests of statistical hypotheses. [14]
A detailed insight into the material crystal structure can be obtained by studying the elastic and damping properties. For example, the interaction of dislocations and point defects in carbon steels are studied. [4] Also the material damage accumulated during a thermal shock treatment can be determined for refractory materials. [5]
twice a week BM bowel movement: commonly used in the United Kingdom when discussing blood sugar. From BM Stix – the measurement sticks used for calculating blood sugar; BM being an abbreviation of Boehringer Mannheim. [8] BNF British National Formulary bol. bolus: as a large single dose (usually intravenously) BP, Ph.Br.
An alternative approach is to slow down reactions by studying samples held at cryogenic temperatures, such as 77 K (liquid nitrogen) or 4.2 K (liquid helium). An example of this work is the study of radical reactions in single crystals of amino acids exposed to x-rays, work that sometimes leads to activation energies and rate constants for ...
The terahertz frequency range used in materials research is usually defined as 0.1 to 10 THz. [note 1] This bandwidth is also known as the terahertz gap because it is noticeably underutilized. [note 2] This is because terahertz waves are electromagnetic waves with frequencies higher than microwaves but lower than infrared radiation and visible ...