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Unformatted text preview: STA 2023 c D.Wackerly - Lecture 1 1 STA 2023 Fall 2002 Thought for the day: Never wrestle with a pig. You both get dirty and the pig likes it. Lecturer: Dennis Wackerly 222 Griffin-Floyd Hall 392-1941 Ext. 227 Office Hours: Tuesday 9:00 AM 12:00 noon Text: Statistics (8th Ed), by McClave and Sincich. Software CD : Minitab (bundled with NEW copy of text, alone or as part TI-83 Graphing Calculator Handbook with Minitab CD, by Kelly). Notes in this class are not to be used for commercial purposes. Note-takers for A+ Notes are not welcome. STA 2023 c D.Wackerly - Lecture 1 2 Course Web page http://web.stat.ufl.edu/ dwack/S2023F02 Computer tools (Acrobat Reader, Stuffit Expander) FULL version of syllabus (download immediately) Formula Sheet Folder of Data sets (Projects and Homework) Projects Answers to projects (2 days before quiz/exam) How to get started with Minitab How to convert McClave data set to Minitab format Course notes (Friday for following week) Sample quizzes, exams STA 2023 c D.Wackerly - Lecture 1 3 HOW TO SUCCEED REGULARLY attend both lectures and discussions. Read and use the text. ACTIVELY do the assignments. DONT FALL BEHIND! For Tomorrow: Pages 210, 39 44. Exercises : 1.13, 1.19 1.23, 2.32, 2.352.36 For Wednesday: Pages 4446, 5054. STA 2023 c D.Wackerly - Lecture 1 4 Chapter 1 Populations, Samples, Statistical Inference STATISTICS : a branch of science that is concerned with collecting and interpreting data. 1. How can I COMMUNICATE data to others? DESCRIPTIVE STATISTICS (p. 2) Summarize Data Histograms (Section 2.2) Pie Charts, Stem and Leaf Diagrams Numerical Summaries 2. How can data be used to REACH CONCLUSIONS? INFERENTIAL STATISTICS (p. 3) STA 2023 c D.Wackerly - Lecture 1 5 Population: a large body of units representing ALL of the items of interest to the data collector. (Defn 1.4, p.4) Variable: a characteristic of an individual population unit that is of interest. (Defn 1.5, p.4) Sample: A subset of items selected from the population. (Defn 1.6, p.5) Contains the information that we actually analyse. EXAMPLE : Population of interest : the group of U.F. students who graduated May 4, 2002. Characteristics (Variables) of interest . Income of parents GPA Have job or not? Number of semesters to graduate. STA 2023 c D.Wackerly - Lecture 1 6 EXAMPLE : According to a survey of 1,002 adults published in USA Today , of the TV viewers who had seen the Lubriderm See you later alligator skin lotion commercials liked them a lot. Population of interest ALL TV viewers who have seen the commercials in the U.S. Characteristic (Variable) of interest Like commericals or not? Sample TV viewers actually interviewed in the survey....
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