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2. Inverse-square law - Wikipedia

   en.wikipedia.org/wiki/Inverse-square_law

   For quick approximations, it is enough to remember that doubling the distance reduces illumination to one quarter; [9] or similarly, to halve the illumination increase the distance by a factor of 1.4 (the square root of 2), and to double illumination, reduce the distance to 0.7 (square root of 1/2). When the illuminant is not a point source ...

3. 68–95–99.7 rule - Wikipedia

   en.wikipedia.org/wiki/68–95–99.7_rule

   In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

4. Coefficient of determination - Wikipedia

   en.wikipedia.org/wiki/Coefficient_of_determination

   When only an intercept is included, then r 2 is simply the square of the sample correlation coefficient (i.e., r) between the observed outcomes and the observed predictor values. [4] If additional regressors are included, R 2 is the square of the coefficient of multiple correlation. In both such cases, the coefficient of determination normally ...

5. Mean squared error - Wikipedia

   en.wikipedia.org/wiki/Mean_squared_error

   The MSE either assesses the quality of a predictor (i.e., a function mapping arbitrary inputs to a sample of values of some random variable), or of an estimator (i.e., a mathematical function mapping a sample of data to an estimate of a parameter of the population from which the data is sampled).

6. RFK Jr. grilled again about his move to California while ...

   www.aol.com/news/rfk-jr-grilled-again-moving...

   Robert F. Kennedy Jr. insisted he plans to return to live in New York, as the independent presidential candidate was grilled for a second day Wednesday about his residency and whether he should be ...

7. Pro-Trump super PAC says it will spend $100 million on ads ...

   www.aol.com/pro-trump-super-pac-says-212305799.html

   A super PAC aligned with former President Donald Trump’s campaign says it’s planning on spending $100 million in ads between now and Labor Day as Trump looks to recapture momentum that has ...