![]() The t TestĪs we have seen throughout this book, many studies in psychology focus on the difference between two means. ![]() In most cases, the online statistical analysis tools mentioned in Chapter 12 will handle the computations-as will programs such as Microsoft Excel and SPSS. The emphasis here is on providing enough information to allow you to conduct and interpret the most basic versions. In this section, we look at several common null hypothesis testing procedures.
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