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03 biostatistics - What/Why/How(Bio)Statistics What is...

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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What/Why/How (Bio)Statistics? PB HLTH C240D/STAT C245D/STAT 246 Sandrine Dudoit Division of Biostatistics and Department of Statistics University of California, Berkeley www.stat.berkeley.edu/~sandrine Spring 2009 Version: 14/01/2009, 22:14
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References Outline 1 What is Statistics? 2 What is Biostatistics? 3 Why (Bio)Statistics? 4 How (Bio)Statistics? 5 Caveat Emptor
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? Many views ... We muddle through life making choices based on incomplete information . (Gonick and Smith, 1993). What makes Statistics unique is its ability to quantify uncertainty , to make it precise. This allows statisticians to make categorical statements, with complete assurance — about their level of uncertainty. (Gonick and Smith, 1993).
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? Figure 1: Gonick and Smith (1993). Cartoon Guide to Statistics.
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? Figure 2: Gonick and Smith (1993). Cartoon Guide to Statistics.
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? Figure 3: Gonick and Smith (1993). Cartoon Guide to Statistics.
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? Statistics is the art of making numerical conjectures about puzzling questions . (Freedman et al., 1978). The raw material of a statistical investigation is a set of observations ; these are the values taken on by random variables X whose distribution P θ is at least partly unknown . ... Statistical inference is concerned with methods of using this observational material to obtain information concerning the distribution of X or of the parameter θ with which it is labeled. (Lehmann, 1986).
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What/Why/How (Bio)Statistics? What is Statistics? What is Biostatistics? Why (Bio)Statistics? How (Bio)Statistics? Caveat Emptor References What is Statistics? The objective of statistics is to make inferences (predictions, decisions) about a population based on information contained in a sample . (Mendenhall, 1987). Statistics is an area of science concerned with the extraction of information from numerical data and its use in making inferences about a population from which the data are obtained. (Mendenhall, 1987).
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