Ch02+Lecture

Ch02+Lecture - CHAPTER 2 Descriptive Statistics:...

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Unformatted text preview: CHAPTER 2 Descriptive Statistics: Organizing, Summarizing, and Graphing Individual Variables 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 Figure 2-1: Histogram for the Frequency Table of Graduate Advisors 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 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 Figure 2-4: Estimating Central Tendency with Histograms Figure 2-5: Calculate the Mean to Confirm Your Estimate Figure 2-6: The Mean as the Function of Our Data Check Your Learning What is the mean age in our class?...
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This note was uploaded on 09/30/2011 for the course PSY 3301 taught by Professor Staff during the Spring '08 term at Texas State.

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Ch02+Lecture - CHAPTER 2 Descriptive Statistics:...

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