Approximation

• Continuity Correction vs. Confidence Interval: What’s the Difference?
  A continuity correction improves normal approximations to discrete probabilities; a confidence interval estimates an unknown parameter. Here is when each applies.
• How to Approximate Simple Functions by Step Functions Almost Uniformly
  On a finite interval, approximate each measurable level set by finite unions of intervals; summable errors make the resulting step functions converge almost uniformly.
• How to Apply Alpha-Max-Beta-Min to Three Numbers
  The two-input alpha-max-beta-min formula does not directly extend to three values; sort their magnitudes and include the middle value.