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.
Repellents containing DEET are used on a variety of sites, including the human body, clothing, headgear, and horses. Formulations of the repellent include liquids, pressurized liquids, lotions, sticks, foams, and impregnated materials such as towelettes. Uses for individual products containing DEET vary widely.