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Uses every value, or only some?

Exercise and reference answers

Items
  1. Item
    Mean
    Category
    Uses every observation
  2. Item
    Standard deviation
    Category
    Uses every observation
  3. Item
    Mean deviation
    Category
    Uses every observation
  4. Item
    Range
    Category
    Uses only a few
  5. Item
    Maximum minus minimum
    Category
    Uses only a few
Categories
  1. Item
    Uses every observation
  2. Item
    Uses only a few

Explanation

This is why the mean and the range behave so differently. Source: syllabus Maths, Ch 13 Statistics.
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