Chapter 1

The Nature of Probability and Statistics

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

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Introduction Statistics is the science of conducting

studies tocollect,organize, summarize, analyze, and draw conclusions from data.

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Section 1-1

Inferential and Descriptive Statistics

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.

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.

Objective 2: Two Branches of Statistics

Statistics

DescriptiveStatistics

Inferential Statistics

Objective 2: Two Branches of Statistics

Statistics

Descriptive Statistics consists of: the collection, organization, summarization, and presentation of data.

Inferential Statistics consists of:1. generalizing from samples to populations2. performing estimations and hypothesis tests.3. determining relationships among variables4. making predictions.

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.

On your own

Read section 1.1 Do Applying concepts on page 5

Due next time class meets.

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