This chapter introduces descriptive statistics, which, as the name implies, describe characteristics of the data. There is an overview of the different levels of measurementnominal, ordinal, interval, and ratioand how they are used. The chapter also defines frequency distributions and distinguishes between univariate and bivariate descriptive statistics. develop a 1-page study sheet that includes the following:The key concepts of the chapter: Focus on the basic concepts that are important for nurses to understand as they review research studies.A description of the statistical methods covered in the chapter, what they measure, and under what circumstances they are used. Identify examples of how the statistical methods have been used in research studies.An explanation of the key statistical tests and how they measure significance (if applicable).

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