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chapter3 - Chapter 3 Central Tendency PowerPoint Lecture...

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Chapter 3 Central Tendency PowerPoint Lecture Slides Essentials of Statistics for the Behavioral Sciences Seventh Edition by Frederick J Gravetter and Larry B. Wallnau
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Learning Outcomes
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Concepts to review Summation notation Frequency distributions
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3.1 Overview of central tendency Central tendency A statistical measure A single score to define the center of a distribution Purpose: find the single score that is most typical or best represents the entire group
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Figure 3.1 What is the “center” of each distribution?
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3.2 The Mean The mean is the sum of all the scores divided by the number of scores in the data. N X = μ n X M =
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The Mean: Three definitions Sum of the scores divided by the number of scores in the data The amount each individual receives when the total is divided equally among all the individuals in the distribution The balance point for the distribution
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Figure 3.2
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Figure 3.3
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Combine two sets of scores Three steps: Determine the combined sum of all the scores Determine the combined number of scores
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chapter3 - Chapter 3 Central Tendency PowerPoint Lecture...

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