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Find the z-score for sample

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Reference no: EM131172599

A sample of n = 4 scores has a mean of M = 75. Find the z-score for this sample:

  • If it was obtained from a population with µ = 80 and Ó = 10.
  • If it was obtained from a population with µ = 80 and Ó = 20.
  • If it was obtained from a population with µ = 80 and Ó = 40.

Reference no: EM131172599

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