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.
Poisonous Ingredient. Most bug repellents contain DEET (N,N-diethyl-m-toluamide) as their active ingredient. DEET is one of the few insect repellents that work. It is recommended to prevent mosquito-born diseases such as malaria, dengue fever, and West Nile virus.