WHAT INFORMATION DO YOU NEED?


A critical step in the design of any study is the decision about what information you are going to record. Of course, you cannot record every possible piece of information about your subjects and their environment. Therefore, you should think hard about what information you will try to get. If you accidentally forget to find out about an important characteristic of your subjects, you may be unable to make sense of the patterns you find in your data. When in doubt, it is usually better to record more information than less. It is easy to leave unnecessary variables out of your data analysis, but it is often difficult (and expensive) to go back and gather additional information. For example, if you are studying what types of people are likely to buy a high-priced new product, you may not be able to adequately compare buyers with nonbuyers if you forget to include information about income.




Six Sigma and Beyond. Statistics and Probability
Six Sigma and Beyond: Statistics and Probability, Volume III
ISBN: 1574443127
EAN: 2147483647
Year: 2003
Pages: 252

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