Guides & How-tos · Worked examples · Real numbers

Statistics guides

Step-by-step how-tos, head-to-head comparisons and honest roundups — every guide worked through with current figures, then backed by a RECATOOLS calculator or AI-directory entry so you can act on it.

498 guides published 17 topic areas Latest guide Oct 2026

Tagged Finance · 2 guides

All 498 Developer Tools 68 AI & ML 63 Finance 52 Home & Living 46 Chinese Culture 43 Statistics 33

Overhead view of hands examining printed financial statements at a desk, with a calculator, a laptop and a pen

Statistics 7 min

The annual Sharpe ratio hides an assumption about your returns

Annualising a monthly Sharpe ratio by multiplying by the square root of twelve is not a unit conversion. It is Andrew Lo...

Nadia Rahim

Pub. 5 Sep

Printed financial charts spread on a dark desk with a magnifying glass held over one line and a percent symbol beside it

Statistics 6 min

A distress-zone Z-score does not mean a 70% chance of bankruptcy

The Altman Z-score's famous 70% is the share of firms that DID fail which had scored in the distress zone — a sensitivit...

Nadia Rahim

Pub. 4 Sep