Fall08stt200CH1to5Lec

Fall08stt200CH1to5Lec - WELCOME TO STT 200 INSTRUCTOR: DR....

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1 WELCOME TO STT 200 INSTRUCTOR: DR. E. DIKONG » VISITING PROFESSOR » COUNTRY: CAMEROON [AFRICA] » CLASS WEBSITE: » http://www.stt.msu.edu
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2 What is Statistics? the science of collecting, organizing, and analyzing data the mathematics of the collection, organization and interpretation of numerical data The branch of mathematics which is the study of the methods of collecting and analyzing data a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters
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3 What is Statistics? Statistics is a discipline which is concerned with: designing experiments and other data collection, summarizing information to aid understanding, drawing conclusions from data, and estimating the present or predicting the future.
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4 What is Statistics? "I like to think of statistics as the science of learning from data ...." Jon Kettenring, ASA President, 1997 Steps of statistical analysis involve: collecting information ( Data Collection ) evaluating the information ( Data Analysis ) drawing conclusions ( Statistical Inference )
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5 What is Statistics? Statistics: two different meanings: (a) IN PLURAL SENSE , STATISTICIS MEANS A SET OF OBSERVATIONS, USUALLY COLLECTED BY MEASUREMENTS OR COUNTING, COLLECTIVELY KNOWN AS DATA. (b) IN SINGULAR SENSE , STATISITICS REFERS TO A GROUP OF SCIENTIFIC METHODS USED TO * collecting data * interpreting and analyzing data * making conclusions or inferences.
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6 TYPES OF STATISTICS DESCRIPTIVE STATISTICS INFERENTIAL STATISTICS STATISTICS REQUIRES SIX PROCEDURES 1.UNDERSTANDING 2.ANALYZING 4.EXECUTING 5.CHECKING 6.REPORTING
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7 CHAPTER 2 DATA SYTEMATICALLY RECORDED INFORMATION , WHETHER NUMBERS OR LABELS, TOGETHER WITH ITS CONTEXT . CONTEXT TELLS WHO, WHAT, WHEN, WHERE, HOW and WHY IS BEING MEASURED. CONTEXT INDIVIDUALS ABOUT WHOM DATA ARE COLLECTED(PARTICIPANTS, RESPONDENTS, SUBJECTS, EXPERIMENTAL UNITS, RECORDS, CASES WH0 WHAT CHARACTERISTICS RECORDED ABOUT EACH INDIVIDUAL (VARIABLES) WHEN TIME WHERE PLACE HOW METHOD OF COLLECTING DATA WHY PURPOSE OF STUDY
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8 DATA TABLE – AN ARRANGEMENT OF DATA IN WHICH EACH ROW REPRESENTS A CASE AND EACH COLUMN REPRESENTS A VARIABLE. NAME AGE (YR) TIME (DAYS) AREA CODE NEAREST STUDIUM INTERNET PURCHASE CATALOG NUMBER ARTIST CATHY 22 130 312 ALI Y 7TY73 MASS SAM 24 18 305 LINCO N CKJ24 BOST CHRIS 43 368 610 VET Y JKN23 FLORI LINDA 35 5 413 SPAR Y 7O28Y APRIL
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9 VARIABLES DEFINITION: THE CHARACTERISTICS RECORDED ABOUT EACH INDIVIDUAL ARE CALLED VARIABLES. TYPES OF VARIABLES CATEGORICAL (QUALITATIVE) QUANTITATIVE (NUMERICAL) OUTCOMES FALL INTO CATEGORIES. OUTCOMES MAYBE IN WORDS OR NUMERALS. EXAMPLES: *COLOR OF EYES(BLUE, BROWN,… *PROFESSION(ENGINEER, FARMER, TEACHER,… OUTCOMES ARE NUMBERS, EITHER DISCRETE OR CON- NUOUS. EXAMPLES: *HEIGHTS OF MSU STUDENTS *NUMBER OF FLOWERS ON A PLANT.
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Fall08stt200CH1to5Lec - WELCOME TO STT 200 INSTRUCTOR: DR....

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