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.
What is DEET? DEET (N,N-ethyl-m-toluamide or m-DET) is the active ingredient in many common brands of insect repellant. Most insect repellants contain 10-25% DEET in the form of a lotion, spray, or oil that is put onto skin or clothing. DEET has been sold in the United States since 1956.