effects test
51Experience curve effects — Experience curve re directs here. For its use in video games see Experience point. The learning curve effect and the closely related experience curve effect express the relationship between experience and efficiency. As individuals and/or… …
52Fixed effects estimation — In econometrics and statistics the fixed effects estimator (also known as the within estimator) is an estimator for the coefficients in panel data analysis. If we assume fixed effects, we impose time independent effects for each entity.… …
53Health effects arising from the September 11 attacks — There has been growing concern over the health effects of the September 11, 2001 attacks in the Financial District of Lower Manhattan. Within seconds of the collapse of the twin towers and Building 7 of the World Trade Center, pulverized building …
54Random effects model — In statistics, a random effect(s) model, also called a variance components model is a kind of hierarchical linear model. It assumes that the data describe a hierarchy of different populations whose differences are constrained by the hierarchy. In …
55Health effects of coffee — The health effects of coffee have been studied to determine how coffee drinking affects humans. Coffee contains several compounds which are known to affect human body chemistry. The coffee bean itself contains chemicals which are mild… …
56Trinity (nuclear test) — For other uses, see Trinity (disambiguation). Trinity The Trinity explosion, 0.016 seconds after detonation. The fireball is about 600 feet (200 m) wide. The black specks silhouetted along the horizon are trees. Information Country… …
57Standardized test — Young adults in Poland sit for their Matura exams. The Matura is standardized so that universities can easily compare results from students across the entire country. A standardized test is a test that is administered and scored in a consistent,… …
582006 North Korean nuclear test — Infobox Military Test Site name = North Korean nuclear test caption = Graphic from the United States Geological Survey showing seismic activity at the time of the test type = Nuclear test site coordinates = coord|41.2943|N|129.1342|E|region:KP… …
59Medical test — Intervention X ray of a hand. X rays are a common medical test. MeSH …
60Pearson's chi-squared test — (χ2) is the best known of several chi squared tests – statistical procedures whose results are evaluated by reference to the chi squared distribution. Its properties were first investigated by Karl Pearson in 1900.[1] In contexts where it is… …
