These magma plumes rise to the surface and form chains of volcanoes. Composite volcano magma contains more silica, SiO 2, than that of a shield volcano and is therefore stickier (more viscous). This stickiness plugs up the volcano, causing pressure to build-up. The result is an explosive, dangerous eruption.
It results in a biased sample, a non-random sample of a population (or non-human factors) in which all individuals, or instances, were not equally likely to have been selected. If this is not accounted for, results can be erroneously attributed to the phenomenon under study rather than to the method of sampling.
bias meaning, bias definition | English Cobuild dictionary. Search also in: Web News Encyclopedia Images. bias. ( biases plural & 3rd person present) ( biasing present participle) ( biased past tense & past participle ) 1 n-var Bias is a tendency to prefer one person or thing to another, and to favour that person or thing. Bias against women permeates every level of the judicial system..., There were fierce attacks on the BBC for alleged political bias. 2 n-var Bias is a concern with or interest in one thing more than others.