Spearmanâs rank correlation test is a test of significance based on Spearmanâs rank correlation coefficient (monotonic correlation between two ranked variables), which is carried out to detect the presence of heteroscedasticity. Assumptions of the test: Population correlation coefficent is 0.
N,N-Diethyl-meta-toluamide, also called DEET (/diËt/) or diethyltoluamide, is the most common active ingredient in insect repellents. It is a slightly yellow oil intended to be applied to the skin or to clothing, and provides protection against mosquitoes, ticks, fleas, chiggers, leeches, and many biting insects. 1 History.
When used as directed in low doses, DEET is relatively not harmful. It is the preferred bug repellent for the prevention of mosquito-borne illnesses such as Dengue fever, malaria, and West Nile virus.hen used as directed in low doses, DEET is relatively not harmful. It is the preferred bug repellent for the prevention of mosquito-borne illnesses such as Dengue fever, malaria, and West Nile virus.