Why do we use averages and sigma chart for large samples instead of averages and ranges chart?

Question

Options

• AFor large samples, a single extreme observation will have a significantly large effect on range,
• BRange is a better measure of dispersion than standard deviation.
• CFor large samples, calculation of range is laborious in comparison to standard deviation.
• DNone of the above.

• A
  73% (19)
• B
  15% (4)
• C
  4% (1)
• D
  8% (2)

Explanation

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