Chapter 2 Describing, Exploring, and Comparing Data
Chapter 2 Slide 1
Describing, Exploring, and Comparing Data
2-1 Overview 2-2 Frequency Distributions 2-3 Visualizing Data 2-4 Measures of Center 2-5 Measures of Variation 2-6 Measures of Relative Standing 2-7 Exploratory Data Analysis
Chapter 2, Triola, Elementary Statistics, MATH 1342
Slide 2
Section 2-1 Overview
Created by Tom Wegleitner, Centreville, Virginia
Chapter 2, Triola, Elementary Statistics, MATH 1342
Overview
Slide 3
Descriptive Statistics
summarize or describe the important characteristics of a known set of population data
Inferential Statistics
use sample data to make inferences (or generalizations) about a population
Chapter 2, Triola, Elementary Statistics, MATH 1342
Important Characteristics of Data
Slide 4
1. Center: A representative or average value that indicates where the middle of the data set is located
2. Variation: A measure of the amount that the values vary among themselves
3. Distribution: The nature or shape of the distribution of data (such as bell-shaped, uniform, or skewed)
4. Outliers: Sample values that lie very far away from the vast majority of other sample values
5. Time: Changing characteristics of the data over time
Chapter 2, Triola, Elementary Statistics, MATH 1342
Slide 5
Section 2-2 Frequency Distributions
Created by Tom Wegleitner, Centreville, Virginia
Chapter 2, Triola, Elementary Statistics, MATH 1342
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