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Unformatted text preview: Lecture 1: Introduction to Lecture 1: Introduction to Data and Distributions Chapter 1 Chapter 1 Important Thing Important Things • www.stat.purdue.edu/~xuanyaoh/stat350 • Syllabu Syllabus – Textbook – Classroom Locations – Policy: Hw/Lab/Class Participation/Exams – Exam Schedule – SAS SAS The Required Textbook The Required Textbook What is Statistics? What is Statistics? Statistics is a mathematical science pertaining to the • Statistics is a mathematical science pertaining to the collection, analysis, interpretation or explanation, and presentation of data • Suppose we want to have an idea about how well do Purdue students do in MA162 in the past 5 years, what can one do to find it out? – Find MA162 records and check them – too many to look at, not realistic in most cases – Draw a number of records and try to make a reasonable guess guess – statistics comes into play! Population vs Sample Population vs. Samples • Population: All objects of interest • Sample: a subset of the population Sample: a subset of the population Examples of Data Examples of Data • Results from making observations on one or more variables x = score on a STAT 350 midterm exam – x = score on a STAT 350 midterm exam – Univariate data or one variable...
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 Spring '08
 Staff
 Normal Distribution, Probability distribution, Histogram, plot histogram plot, self reading, St ti ti

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