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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) .. Elements of Hypothesis Tests .. Significance Level of a Test (Size of a Test).

Applications of statistics are often based on comparing outcomes among groups of subjects. That is, we’d like to compare outcomes among different populations. The variable(s) we measure as the outcome of interest is the dependent variable, or response. The variable that determines the

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