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.
DEET (N,N-diethyl-meta-toluamide). Summary: DEET is a chemical (N,N-diethyl-meta-toluamide) used as the active ingredient in many insect repellent products.DEET was developed by the U.S. Army in 1946 and was registered for use by the general public in 1957.It is now widely used, with approximately 30% of the U.S. population using DEET repellents each year.EET was developed by the U.S. Army in 1946 and was registered for use by the general public in 1957. It is now widely used, with approximately 30% of the U.S. population using DEET repellents each year.