Question: 13.10 Even though the population standard deviation is unknown, an investigator uses z rather than the more appropriate t to test a hypothesis at the

13.10 Even though the population standard deviation is unknown, an investigator uses z rather than the more appropriate t to test a hypothesis at the .05 level of significance.

  1. Is the true level of significance larger or smaller than .05?
  2. Is the true critical value larger or smaller than that for the critical z?

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