INTRODUCTION TO STATISTICS

1. DATA CLASSIFICATION

1.1. SOURCE

1.1.1. PRIMARY

1.1.2. SECONDARY

1.2. MEASUREMENT

1.2.1. QUANTITATIVE

1.2.2. QUALITATIVE

1.3. PRECISENESS

1.3.1. DISCRETE

1.3.2. CONTINUOUS

1.4. NUMBER OF VARIABLES

1.4.1. UNIVARIATE

1.4.2. BIVARIATE

1.4.3. MULTIVARIATE

2. METHODS OF COLLECTING DATA

2.1. EXTRACT FROM PUBLISHED DATA

2.2. DIRECT OBSERVATION

2.3. SURVEY

2.3.1. INTERVIEW

2.3.2. QUESTIONNAIRE

3. SAMPLING TECHNIQUE

3.1. TERMS

3.1.1. POPULATION-CENSUS

3.1.2. SAMPLE-SAMPLE SURVEY

3.1.3. PILOT SURVEY

3.2. RANDOM

3.2.1. SIMPLE RANDOM SAMPLING

3.2.2. SYSTEMATIC SAMPLING

3.2.3. STRATIFIED SAMPLING

3.2.4. CLUSTER SAMPLING

3.2.5. MULTISTAGE SAMPLING

3.3. NON-RANDOM

3.3.1. CONVENIENCE SAMPLING

3.3.2. JUDGMENTAL SAMPLING

3.3.3. QUOTA SAMPLING

3.3.4. SNOWBALL SAMPLING

4. STATISTICS DEFINITION

4.1. COLLECT, ARRANGE, PRESENT, ANALYZE DATA AND MAKING DECISIONS

5. TYPES OF STATISTICS

5.1. DESCRIPTIVE STATISTICS

5.1.1. PRESENT IN AN UNDERSTABLE WAY

5.2. INFERENTIAL STATISTICS

5.2.1. MAKING INFERENCES ABOUT A POPULATION BASED ON INFO FROM RANDOM SAMPLE