The best way to observe, first-hand, the concepts of sampling distributions is to conduct sampling experiments with real data. However, sampling experiments can be prohibitively time consuming and tedious. An excellent alternative is to conduct computer-assisted sampling experiments or simulations. Visual Statistics by Doane, Mathieson, and Tracy (Irwin/McGraw-Hill) includes a simulation module to illustrate sampling distributions and the Central Limit Theorem. In this exercise, we will download and install the Central Limit Theorem demonstration module from Visual Statistics and use the software to demonstrate the Central Limit Theorem.
From the Irwin/McGraw-Hill Business Statistics Center (www.mhhe.com/business /opsci/bstat/), select in turn -" Visual Statistics and Other Data Visualization Tools" : "Visual Statistics by Doane" : "Free Stuff"-and download both the CLT module and the Worktext. When the download is complete, install the CLT module by double-clicking the installation file (vs_setup.exe). Study the overview and orientation sections of the work text and work through the first four learning exercises on the Width of Car Hood example.