Three different testing procedures which involve a minimum of modification of the usual single sample tests of the hypotheses considered are given here. Tests are made by taking samples at two stages ...

A score test for the null hypothesis of proportional hazards against rank-regression alternatives is proposed as a complement to the logrank test for comparing censored survival curves. The test ...

Figure 1: Schematic illustration of a TIS. Isopentane is harmful to health, highly flammable and hazardous to the environment. Work with gloves and do not inhale it. 4% (wt/vol) PFA solution Dissolve ...

Chorionic villus sampling (CVS) is a prenatal test used to detect birth defects, genetic diseases, and other problems during pregnancy. During the test, a small sample of cells (called chorionic villi ...

There are a multitude of available test procedures and methods for water and wastewater treatment operators. They range from colorimetric, titrimetric, electrometric (meter & probe), turbimetric, ...

Saliva tests: Earlier this month, an alternative form of COVID-19 diagnostic testing was approved by the US’ Food and Drug Administration (FDA). This testing method processes saliva samples and the ...

A vaginal wet mount test, or vaginal smear, is a gynecological exam. The doctor takes a sample of discharge and sends it for testing. Results can show whether a person has vaginitis, which is a term ...