This module is concerned with the process of estimation when we use a sample to give us some idea of what is happening in a larger population.

It covers a number of different aspects of this process.

You may work through the various parts of this unit in any order, but the recommended route is indicated along the top menu. You are advised to start by clicking on the Introduction at the top of the page. On any page you may use the links along the top to navigate, to return to the DISCUSS home page or this module's home page use the titles at the top of the page.

The interactive elements of this module use Microsoft Excel 97 and will not run unless this software (or a later version) is installed on your computer (or network). Excel uses settings taken from the first worksheet opened in the session, so please ensure that you do not have Excel already running when you start to use any of our spreadsheets.