confounding
51Race (classification of human beings) — The term race or racial group usually refers to the concept of categorizing humans into populations or groups on the basis of various sets of characteristics. [http://www.physanth.org/positions/race.html AAPA Statement on Biological Aspects of… …
52Tea — For other uses, see Tea (disambiguation). Tea Longjing tea being infused in a glass …
53Causality — (but not causation) denotes a necessary relationship between one event (called cause) and another event (called effect) which is the direct consequence (result) of the first. [http://dictionary.reference.com/search?q=Causality x=35 y=25 Random… …
54Mass noun — Not to be confused with Collective noun. Examples advice air art blood butter deodorant equipment food furniture garbage graffiti grass homework housework information …
55Simpson's paradox — (or the Yule Simpson effect) is a statistical paradox wherein the successes of groups seem reversed when the groups are combined. This result is often encountered in social and medical science statistics [cite journal title = Simpson s Paradox in …
56Gulf War syndrome — (GWS) or Gulf War illness (GWI) is an illness reported by combat veterans of the 1991 Persian Gulf War typified by symptoms including immune system disorders and birth defects. It has not always been clear whether these symptoms were related to… …
57Least squares — The method of least squares is a standard approach to the approximate solution of overdetermined systems, i.e., sets of equations in which there are more equations than unknowns. Least squares means that the overall solution minimizes the sum of… …
58Ronald Fisher — R. A. Fisher Born 17 February 1890(1890 02 17) East Finchley, London …
59Natural experiment — A natural experiment is an observational study in which the assignment of treatments to subjects has been haphazard: That is, the assignment of treatments has been made by nature , but not by experimenters. Thus, a natural experiment is not a… …
60Medical cannabis — American Cannabis Indica purchased at a Medical Cannabis dispensary …
