'Sample variance standard deviation' diaporamas de présentation

Chapter

Chapter. 2. Descriptive Statistics. Chapter Outline. 2.1 Frequency Distributions and Their Graphs 2.2 More Graphs and Displays 2.3 Measures of Central Tendency 2.4 Measures of Variation 2.5 Measures of Position. Section 2.4. Measures of Variation. Section 2.4 Objectives.

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Section 2.4

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Set 3

Set 3. Numerical description of data, data transformation. Measures based on rank of data. Five number summary Minimum = The smallest data value First Quartile = Q1, 25% below, 75% above Median = M, a middle, 50% below, 50% above Third Quartile = Q3, 75 % below 25% above

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Making inferences from collected data involve two possible tasks:

Making inferences from collected data involve two possible tasks:. Estimation : Use sample data to infer population parameter ? e.g., lifetime risk of being a victim of a violent crime according to NCVS data Hypothesis Testing :

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