Chapter 2

# Chapter 2 - MAT2378 Rafal Kulik Version 2009/Sep/09 Rafal...

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MAT2378 Rafa±l Kulik Version 2009/Sep/09 Rafa±l Kulik

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MAT2378 Probability and Statistics for the Natural Sciences Chapter 2 Comments These slides cover material from Chapter 2, Sections 2.1-2.6. They are almost complete . For Chapter 2, I will use a blackboard rarely. Please, read these slides before coming to class. I’m planning to spend 3 lectures on this material. I’m not re-writing the textbook. There may be some typos. The ﬁnal version of the slides will be posted after the chapter is ﬁnished. MINITAB will be used to illustrate data analysis concepts. Tutorial will be given. Rafa± l Kulik 1
MAT2378 Probability and Statistics for the Natural Sciences Chapter 2 What is statistics? Statistics is the science of collecting, organising, interpreting and reporting data. Data Analysis Methods for summarizing data numerically and visually. Probability Mathematical development of statistical models. Inference Methods of drawing inferences about a population from a random sample . Rafa± l Kulik 2

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MAT2378 Probability and Statistics for the Natural Sciences Chapter 2 Samples and Populations Variable : a particular characteristic of an object under study. Categorical variable : Blood type (A, B, AB, O); Sex (M, F); Ordinal variable : Quality of service (poor, average, good); Quantitative variable : discrete : Age of a person (in years); continuous : Weight of a person; Rafa± l Kulik 3
MAT2378 Probability and Statistics for the Natural Sciences Chapter 2 We will deal with random experiments (e.g. measurements of weight). In any “experiment” we obtain a sample (e.g. people in a particular hospital) and deﬁne the sample space as the set of all possible outcomes. This

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Chapter 2 - MAT2378 Rafal Kulik Version 2009/Sep/09 Rafal...

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