June 2014
Beginner to intermediate
288 pages
7h 2m
English
Content preview from Better Business Decisions from Data
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CHAPTER 9
General Procedure for Comparisons
Eight Easy Steps from Null to Significance
After you decide what is to be compared with what, you should clearly define the null hypothesis. It is very easy to later become confused between the null hypothesis and the alternative hypothesis.
The next step is to choose the acceptable level of statistical significance. It is important to fix and declare this significance level at the outset so that your choice will not be influenced by the result you obtain.
Next choose the statistical test you will use. The following three chapters will describe the appropriateness of various tests in relation to the available data and the conclusions sought. Each statistical test employs published tables from which ...
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