Welcome to Play Smart, a game-improvement column that drops every Monday, Wednesday and Friday from Game Improvement Editor Luke Kerr-Dineen (who you can follow on Twitter right here). Last Saturday ...

Achieving quality in the medical laboratory requires the use of many tools. This workbook explains the basic knowledge necessary to understand a simple but effective statistical process control system ...

Bar charts are a way to represent categorical data visually, in a horizontal or vertical display. Bars can be single, stacked, or grouped. By looking through the whole chart, it is easy to see the ...