1. 1 Pertemuan 1 Pendahuluan-1 Matakuliah: A0064/Statistik Ekonomi Tahun: 2005 Versi: >

2. 2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan pengertian serta konsep- konsep dasar statistik seperti data, skala pengukuran, sampel dan populasi

3. 3 Pendahuluan-1 Macam Data dan Skala Pengukuran Sampel dan Populasi

4. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-4 l Using Statistics l Percentiles and Quartiles l Measures of Central Tendency l Measures of Variability l Grouped Data and the Histogram l Skewness and Kurtosis l Relations between the Mean and Standard Deviation l Methods of Displaying Data l Exploratory Data Analysis l Using the Computer Introduction and Descriptive Statistics 1

5. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-5 1-1. Using Statistics (Two Categories) l Inferential Statistics Predict and forecast values of population parameters Test hypotheses about values of population parameters Make decisions l Descriptive Statistics Collect Organize Summarize Display Analyze

6. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-6 l Qualitative - Categorical or Nominal: Examples are- Color Gender Nationality l Quantitative - Measurable or Countable: Examples are- Temperatures Salaries Number of points scored on a 100 point exam Types of Data - Two Types

7. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-7 Nominal Scale - groups or classes Gender Ordinal Scale - order matters Ranks Interval Scale - difference or distance matters – has arbitrary zero value. Temperatures Ratio Scale - Ratio matters – has a natural zero value. Salaries Scales of Measurement

8. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-8 l A population consists of the set of all measurements for which the investigator is interested. l A sample is a subset of the measurements selected from the population. l A census is a complete enumeration of every item in a population. Samples and Populations

9. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-9 l Sampling from the population is often done randomly, such that every possible sample of equal size (n) will have an equal chance of being selected. l A sample selected in this way is called a simple random sample or just a random sample. l A random sample allows chance to determine its elements. Simple Random Sample

10. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-10 Population (N)Sample (n) Samples and Populations

11. COMPLETE 5 t h e d i t i o n BUSINESS STATISTICS Aczel/Sounderpandian McGraw-Hill/Irwin © The McGraw-Hill Companies, Inc., 2002 1-11 l Census of a population may be: Impossible Impractical Too costly Why Sample?

12. 12 Penutup Pembahasan materi dilanjutkan dengan Materi Pokok 2 (Pendahuluan-2)