Funnel chart is widely used for sales data representation. Learn how to create & insert Funnel Chart in Excel, Excel Mobile, PowerPoint and Word.

Sue Duval, Richard Tweedie, Trim and Fill: A Simple Funnel-Plot-Based Method of Testing and Adjusting for Publication Bias in Meta-Analysis, Biometrics, Vol. 56, No. 2 (Jun., 2000), pp. 455-463 ...