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Chapter 4 for Stats

Chapter 4 for Stats - Chapter 4 Measures of Central...

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Chapter 4 Measures of Central Tendency

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Measures of central tendency describe middle characteristics of data set Mode Median Mean
Mode score that occurs most frequently Advantages easy to determine can be used with data on an ordinal scale Disadvantages unstable terminal statistic (can’t be used for further calculations) disregards extreme scores

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Learning Goal Given a set of data, be able to identify the mode. A service station repaired 18, 15, 12, 20, 19, 11, 14, 38, 18, and 17 flat tires on ten consecutive days. What is the mode for the number of flat tires repaired each day? A. 19 B. 11 C. 18 D. 38
Median associated with 50 th percentile divides data set in half If N is odd, median is middle score If N is even, median falls between two scores higher score usually designated as median value of scores is ignored appropriate for ordinal data or highly skewed data not affected by extreme scores

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Learning goal
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Chapter 4 for Stats - Chapter 4 Measures of Central...

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