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2. Negative relationship - Wikipedia

   en.wikipedia.org/wiki/Negative_relationship

   Negative correlation can be seen geometrically when two normalized random vectors are viewed as points on a sphere, and the correlation between them is the cosine of the circular arc of separation of the points on a great circle of the sphere. [1] When this arc is more than a quarter-circle (θ > π/2), then the cosine is negative.

3. Berkson's paradox - Wikipedia

   en.wikipedia.org/wiki/Berkson's_paradox

   An illustration of Berkson's Paradox. The top graph represents the actual distribution, in which a positive correlation between quality of burgers and fries is observed. However, an individual who does not eat at any location where both are bad observes only the distribution on the bottom graph, which appears to show a negative correlation.

4. Taylor diagram - Wikipedia

   en.wikipedia.org/wiki/Taylor_diagram

   The sample Taylor diagram shown in Figure 1 [16] provides a summary of the relative skill with which several global climate models simulate the spatial pattern of annual mean precipitation. Eight models, each represented by a different letter on the diagram, are compared, and the distance between each model and the point labeled “observed ...

5. Spherical design - Wikipedia

   en.wikipedia.org/wiki/Spherical_design

   The existence and structure of spherical designs on the circle were studied in depth by Hong. [2] Shortly thereafter, Seymour and Zaslavsky [3] proved that such designs exist of all sufficiently large sizes; that is, given positive integers d and t, there is a number N(d,t) such that for every N ≥ N(d,t) there exists a spherical t-design of N points in dimension d.

6. Bitter cold in forecast: December set for 'coldest start' in ...

   www.aol.com/news/bitter-cold-forecast-december...

   Freeze warnings in Southeast and Gulf Coast. The National Weather Service had issued freeze warnings for northeast Florida (north of Jacksonville), southeast South Carolina and southeast Georgia ...

7. NFL continues ratings domination with big Saturday showing ...

   www.aol.com/sports/nfl-continues-ratings...

   The NFL continued to prove that it is king with a strong showing in the ratings department for its two Saturday afternoon games that went up against competition from the College Football Playoff ...

8. Texas daycare worker allegedly kicked toddlers more than 100 ...

   www.aol.com/texas-daycare-worker-allegedly...

   A Texas daycare worker was arrested on accusations she kicked and pushed at least six toddlers over a three-month period.. Catherine Guziejka, 44, was booked into the Smith County Jail on Oct. 30 ...

9. Charts on SO (3) - Wikipedia

   en.wikipedia.org/wiki/Charts_on_SO(3)

   If we use a skew-symmetric matrix, every 3 × 3 skew-symmetric matrix is determined by 3 parameters, and so at first glance, the parameter space is R 3. Exponentiating such a matrix results in an orthogonal 3 × 3 matrix of determinant 1 – in other words, a rotation matrix, but this is a many-to-one map.