The Numbers Guide, now in its fifth edition, is aimed at managers who have budgetary, planning or forecasting responsibilities and is invaluable for everyone who wants to be competent, and able to communicate effectively, with numbers. There are chapters on Key Concepts * Finance and investment * Measures for interpretation and analysisForecasting techniques * Sampling and hypothesis testingIncorporating judgments into decisions * Decision-making Linear programming and networking * How spreadsheet programmes can make it easy. The guide also points out common pitfalls, such as: * On roundi