1. The Nature of Probability and Statistics
Chapter 1
The Nature of Probability
and Statistics

2. Chapter 1 Overview Introduction
1-1 Descriptive and Inferential Statistics
1-2 Variables and Types of Data
1-3 Data Collection & Sampling Techniques
1-4 Observational and Experimental Studies
1-5 Uses and Misuses of Statistics
1-6 Computers and Calculators
Bluman Chapter 1

3. Introduction Statistics is the science of conducting studies to
collect,
organize,
summarize,
analyze, and
draw conclusions from data.
Bluman Chapter 1

4. Inferential and Descriptive Statistics
Section 1-1
Inferential and Descriptive Statistics

6. Objective 1: knowledge of statistical terms
A variable is a characteristic or attribute that can assume different values.
The values that a variable can assume are called data.
Random variable: Any variable whose value is determined by chance.

7. Objective 1: knowledge of statistical terms
A collection of data values forms a data set.
Each value in the data set is called a data value or datum.

8. Objective 2: Two Branches of Statistics
Descriptive
Inferential

9. Objective 2: Two Branches of Statistics
Descriptive Statistics consists of:
the collection, organization, summarization, and presentation of data.
Inferential Statistics consists of:
1. generalizing from samples to populations
2. performing estimations and hypothesis tests.
3. determining relationships among variables
4. making predictions.

10. The Oregonian 9/9/2010

11. More terms to know
A Population consists of all subjects ( human or otherwise) that are being studied.
A Sample is a group of subjects from a population.

12. On your own Read section 1.1 Do Applying concepts on page 5
Due next time class meets.
Bluman Chapter 1