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Math 15 – Elementary Statistics Chapter 5 – Part 2 Summarizing Data Numerically
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Measuring Spread Class A – 73, 74, 75, 76, 77 Class B – 55, 65, 75, 85, 95
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Measuring Spread Class A – 73, 74, 75, 76, 77 Class B – 55, 65, 75, 85, 95
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Variance and Standard Deviation
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Example
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Percentiles
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Exam Scores – 32, 35, 43, 56, 66, 69, 73, 74, 75, 77, 78, 79, 80, 81, 83, 85, 87, 88, 92, 98 Median (50 th percentile) Quartiles (25 th and 75 th percentiles)
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Percentiles Exam Scores – 32, 35, 43, 56, 66, 69, 73, 74, 75, 77, 78, 79, 80, 81, 83, 85, 87, 88, 92, 98 90 th percentile?
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IQR and 5 – Number Summary
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Outliers?
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Yuck? What are you learning here?
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Example
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Arcata Real Estate – Described Numerically and Graphically!
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