Statistika (intro. to Statistics)

What is Statistics? We muddle through life Making choices based on Incomplete information

What is Statistics? We muddle through life Making choices based on Incomplete information

What is Statistics? This is not just a matter of ordering soup! Statistics also Involves matters of Life and Death

The Population and The Sample

Descriptive and Inferential Statistics Ex. mean, median, modus, etc. Ex. hypothesis testing, analysis of variance, corelation, regression, etc.

Variables and Data Ex. body temperature is a variable that changes over time within a single individual; it also varies from person to person. Religious affiliation, ethnic origin, income, height, age, and number of offspring are all variables—characteristics that vary depending on the individual chosen.

Variables and Data Ex. body temperature is a variable that changes over time within a single individual; it also varies from person to person. Religious affiliation, ethnic origin, income, height, age, and number of offspring are all variables—characteristics that vary depending on the individual chosen.

Variables and Data There are several variables in this example. The experimental unit on which the variables are measured is a particular undergraduate student on the campus, identified in column A. Five variables are measured for each student: grade point average (GPA), gender, year in college, major, and current number of units enrolled. If we consider the GPAs of all students at this university to be the population of interest, the five GPAs in column B represent a sample from this population. If the GPA of each undergraduate student at the university had been measured, we would have generated the entire population of measurements for this variable.

Variables and Data

Types of Variables

References Gonick, Larry and Woollcott Smith The Cartoon Guide to Statistics. Harper Collins Publishers, New York, US. Mendelhall, William Introduction to Probability & Statistics 14 th Edition. Brooks/Cole Cengage Learning, Boston, US. Ross, Sheldon M Introduction to Probability and Statistics For Engineers And Scientists 3 rd Edition. Elsevier Academic Press, London, UK. Widiyanto, Mikha Agus Statistika Terapan : Konsep & Aplikasi SPSS/LISREL dalam Penelitian Pendidikan, Psikologi & Ilmu Sosial lainnya. PT. Elex media Komputindo, Jakarta, Indonesia.

Statistik dan Statistika Statistik : berkenaan dengan ukuran dari sekelompok data atau angka- angka. Statistika : berkenaan dengan metode, teknik dan prosedur dalam pengolahan data, penafsiran dan pengambilan keputusan atas sekelompok data.