Chapter 1
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Transcript of Chapter 1
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Chapter 1
The Nature of Probability and Statistics
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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
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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.
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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.
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Objective 2: Two Branches of Statistics
Statistics
DescriptiveStatistics
Inferential Statistics
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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.
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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.
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On your own
Read section 1.1 Do Applying concepts on page 5
Due next time class meets.
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