# INTRODUCTION TO STATISTICS

1.definition2. types of statistics3. data classification4. method of collecting data5. sampling techniques

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INTRODUCTION TO STATISTICS

## 2. TYPES OF STATISTICS

### 2.1. DESCRIPTIVE STATISTICS

2.1.1. PRESENT IN AN UNDERSTABLE WAY

### 2.2. INFERENTIAL STATISTICS

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

## 3. DATA CLASSIFICATION

3.1.1. PRIMARY

3.1.2. SECONDARY

### 3.2. MEASUREMENT

3.2.1. QUANTITATIVE

3.2.2. QUALITATIVE

### 3.3. PRECISENESS

3.3.1. DISCRETE

3.3.2. CONTINUOUS

### 3.4. NUMBER OF VARIABLES

3.4.1. UNIVARIATE

3.4.2. BIVARIATE

3.4.3. MULTIVARIATE

## 4. METHODS OF COLLECTING DATA

### 4.3. SURVEY

4.3.1. INTERVIEW

4.3.2. QUESTIONNAIRE

## 5. SAMPLING TECHNIQUE

### 5.1. TERMS

5.1.1. POPULATION-CENSUS

5.1.2. SAMPLE-SAMPLE SURVEY

5.1.3. PILOT SURVEY

### 5.2. RANDOM

5.2.1. SIMPLE RANDOM SAMPLING

5.2.2. SYSTEMATIC SAMPLING

5.2.3. STRATIFIED SAMPLING

5.2.4. CLUSTER SAMPLING

5.2.5. MULTISTAGE SAMPLING

### 5.3. NON-RANDOM

5.3.1. CONVENIENCE SAMPLING

5.3.2. JUDGMENTAL SAMPLING

5.3.3. QUOTA SAMPLING

5.3.4. SNOWBALL SAMPLING