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.
Most insect repellents contain the chemical N,N-diethyl-m-toluamide, commonly known as Deet. Deet is a highly effective insecticide and Deet-based insect repellents are relatively safe if you use them carefully. Health Canada and the Public Health Agency of Canada say that products containing 50 per cent Deet are safe for you to use in pregnancy. Just make sure you use them according to the manufacturersâ guidelines.