For example, while the summary() function returns column statistics excluding missing values (and also tells you how many NAs are in the data), the mean() function will return NA if even only one ...

Basic Graphical Statistics. Bar Charts Bar charts are a way to represent categorical data visually, in a horizontal or vertical display. Bars can be single, ... This website allows users to load ...

Today isn't just a pretty neat date (20/10/2010); it's also World Statistics Day . While designed to celebrate the collectors of national statistics, ...