9/18/2009

Methods of Collecting Data

• Census
• Sample
• Experiment
• Observational Study
• Anecdotal Evidence

The Idea Behind Sampling

• parameters versus statistics

Random Rectangles Activity (p:\data\math\stats\randrect.mtw)

• Randomization with IPS Applet and Minitab
• Tables of Random Digit

Different Types of Sampling

• Judgement
• Self-Selected
• Systematic
• Random
• Stratified
• Cluster
• Multistage

Group Activity

• You may work with one or two partners for this small group assignment. However, you may not speak to any other individuals, including librarians or other staff members, for assistance with this project. Your task is to use one of the sampling methods you have read about to estimate the total number of books in the library with blue covers. By the end of the day on Sunday, Sept. 20, you must submit a one page summary containing your names, a short description of your sampling method, and an estimate. You can submit your summaries by sending me an e-mail message or by simply sliding them under my office door (RBH 305).