The 5 Basic Statistics Concepts Data Scientists Need to Know

Key Concepts:

  1. Median, Skewed, Variance, Standard Deviation
  2. Uniform, Normal / Poisson Distribution
  3. Baeysian Probability
  4. Over & Under Sampling
  5. Dimensionality Reduction


Unknown German Retiree Proved The “Gaussian Correlation Inequality” Conjecture

\boxed {P (a + b) \geq P (a) \times P (b)}

Case “=” : if (a, b) independent 
Case “>” : if (a, b) dependent

Thomas Royen used only high-school math (function, derivative) in his proof in 2014. He then published it in website – like Perelman did with the “Poincaré Conjecture”.

Statistics detects cheat

Statistics & Truth [by CR Rao]:

RedCross hires local food contractors to supply rice, salt, water to N unknown survived victims of a recent Earthquake.

The bill shows they supply quantities R, S, W, resp, per day.
Assume average daily consumption per person be r, s, w resp.

To verify any cheating of overbill by contractors:

R/r = S/s = W/w = N