See words that rhyme with niche Dictionary: Definition of niche Medical Dictionary: Definition of niche Spanish Central: Translation of niche Nglish: Translation of niche for Spanish speakers Britannica English: Translation of niche for Arabic speakers Britannica.com: Encyclopedia article about niche
The Mann-Whitney U-test is used to test whether two independent samples of observations are drawn from the same or identical distributions. An advantage with this test is that the two samples under consideration do not necessarily need to have the same number of observations or instances.
Alpha Fetoprotein. The quad screen is a blood test typically performed between 15 and 20 weeks of pregnancy to detect women whose pregnancies may be at higher risk for three types of problems: open neural tube defects (such as spina bifida, an opening in the spine); Down syndrome and trisomy 18 (chromosome abnormalities).