slide1

# slide1 - Chapter 1 Introduction 1 Some basic concepts 1...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 1: Introduction 1 Some basic concepts 1. Statistics Statistics could refer to numerical facts or to the field or discipline of study . Definition 1.1 Statistics is a science that helps us make sense of data. 2. Types of statistics Descriptive statistics consists of methods for organizing, dis- playing, and describing data by using tables, graphs, and sum- mary measures. Inferential statistics consists of methods that use sample results to help make decisions or predictions about a population. 3. Population versus sample Definition 1.2 (Population or target population) A population con- sists of all elements individuals, items, or objects whose character- istics are being studied. The population that is being studied is also called the target population. Definition 1.3 (Sample) A portion of population selected for study is referred to as a sample. 1 Definition 1.4 (Census and sample survey) A survey that includes every member of the population is called a census. The technique of col-every member of the population is called a census....
View Full Document

## This note was uploaded on 02/05/2012 for the course ST 210 taught by Professor Wangs during the Fall '09 term at S. Alabama.

### Page1 / 3

slide1 - Chapter 1 Introduction 1 Some basic concepts 1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online