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What (who) is R2 - definition
R2 (Rock'n'Reel)
ENGLISH MAGAZINE
Rock'n'Reel; Rock n Reel; R2 (Rock'n'Reel)
R2 is a music magazine published bi-monthly in the United Kingdom. It was launched in 1988 as Rock'n'Reel, changing its name to R2 in early 2009.
Signalling System R2
FAMILY OF TELEPHONY PROTOCOLS FOR LINE AND REGISTER SIGNALLING
R2 signaling; Multi Frequency Compelled; R2 signalling
Signalling System R2 is a signalling protocol for telecommunications that was in use from the 1960s mostly in Europe, and later also in Latin America, Asia, and Australia, to convey exchange information between two telephone switching systems for establishing a telephone call via a telephone trunk.ITU-T Recommendation Q.
Coefficient of determination
![Comparison of the [[Theil–Sen estimator]] (black) and [[simple linear regression]] (blue) for a set of points with [[outlier]]s. Because of the many outliers, neither of the regression lines fits the data well, as measured by the fact that neither gives a very high ''R''<sup>2</sup>.](https://commons.wikimedia.org/wiki/Special:FilePath/Thiel-Sen estimator.svg?width=200 "Comparison of the [[Theil–Sen estimator]] (black) and [[simple linear regression]] (blue) for a set of points with [[outlier]]s. Because of the many outliers, neither of the regression lines fits the data well, as measured by the fact that neither gives a very high ''R''<sup>2</sup>.")
INDICATOR FOR HOW WELL DATA POINTS FIT A LINE OR CURVE
R-squared; R squared; Squared multiple correlation; R-square; R square; R-squared value; Proportion of variation; Adjusted R^2; Adjusted R2; Adjusted R-squared; Partial R-square
In statistics, the coefficient of determination, denoted R2 or r2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).
Examples of use of R2
1. He does the R2–D2 ‘wobble‘, the R2–D2 ‘shuffle‘ and then the audience ask predictably stupid questions.
2. What is the relationship between R2–D2 and C3PO, the camp, golden protocol droid?
3. The owner, The R2 Property Company, would not talk to CNN for this story.
4. Even the most deluded fans are wilting, and a man with an R2–D2 rucksack storms out.
5. Full–board R1,'50–R2,'50pp (around 150–227). Includes two daily safaris, guided walks & tourism levy.