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Ch02+Lecture

# Ch02+Lecture - CHAPTER 2 Descriptive Statistics Organizing...

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CHAPTER 2 Descriptive Statistics: Organizing, Summarizing, and Graphing Individual Variables

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Organizing Our Data: A First Step in Identifying Patterns Distributions (the pattern of a set of numbers) Four different ways to visually describe just one variable Frequency table Grouped frequency table Frequency histograms Frequency polygon

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Figure 2-2: Histogram for the Grouped Frequency Table of Stroop Data
Figure 2-3: Frequency Polygons as Another Graphing Option for the Stroop Data

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Check Your Learning How old are the students in our class? Construct a frequency table; grouped frequency table; histogram; frequency polygon. What is the best method of presentation for our data?
Central Tendency: Determining the Typical Score Mean: arithmetic average Median: middle score Mode: most common score

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Figure 2-4: Estimating Central Tendency with Histograms
Figure 2-5: Calculate the Mean to Confirm Your Estimate

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Figure 2-6: The Mean as the Function of Our Data

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Check Your Learning What is the mean age in our class?
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Ch02+Lecture - CHAPTER 2 Descriptive Statistics Organizing...

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