Finding Measures of Variation

Statistics2015_10_3_Homework_2

Measures of Variation
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Finding Measures of Variation

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Statistics2015_10_3_Homework_2
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  1. Measures of Center and Variation

    Slide 1 - Measures of Center and Variation

    • Statistics
  2. Find the measures of variability and any outliers for each set of data.

    Slide 2 - Find the measures of variability and any outliers for each set of data.

    • {8, 3, 9, 14, 12, 11, 20, 23, 5, 26}
    • Put in order from least to greatest
    • 3 5 8 9 11 12 14 20 23 26
    • Find the median
    • X
    • X
    • X
    • X
    • X
    • X
    • X
    • X
    • 11.5
    • Find the quartiles
    • [ ]
    • [ ]
    • 1st Quartile (Q1)
    • 8
    • 20
    • 3rd Quartile (Q3)
    • Find the Inter-Quartile Range (IQR)
    • IQR = Q3 – Q1
    • = 20 – 8
    • = 12
    • Find the Outlier Factor
    • 1.5(IQR)
    • = 1.5(12)
    • = 18
    • Find the Outlier Min and Max
    • Min Outlier threshold = Q1 – 18 = 8 – 18 = -10
    • Max Outlier threshold = Q3 + 18 = 20 + 18 = 38
    • NO OUTLIER