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Introduction to Biostatistics

Introduction to BiostatisticsLarry WinnerDepartment of StatisticsUniversity of FloridaJuly 8, 20042 Contents1 Populations and Samples .. Types of Variables .. Quantitative vs Qualitative Variables .. Dependent vs Independent Variables .. Parameters and Statistics .. Graphical Techniques .. Basic Probability .. Diagnostic Tests .. Basic Study Designs .. Observational Studies .. Experimental Studies .. Other Study Designs .. Reliability and Validity .. Exercises .. 312 Random Variables and Probability The Normal Distribution .. Statistical Models .. Sampling Distributions and the Central Limit Theorem .. Distribution ofY.. Exercises .. 403 Statistical Inference Hypothesis Introduction to Hypothesis Testing .. Large Sample Tests Concerning 1 2(Parallel Groups).

which patients would mark, and which a numeric score (e.g. percent of distance from bottom to top of scale) can be obtained (Scott and Huskisson, 1976). Figure 1.1: Visual Analogue Scales corresponding to pain relief and pain Example 1.2 In many instances in social and medical sciences, no precise measurement of an outcome can be made.

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