MichealM5342 MichealM5342
  • 22-05-2023
  • Mathematics
contestada

Which of the following is not an assumption needed to perform a hypothesis test on a single mean using a z test statistic?
a) An SRS of size n from the population.
b) Known population standard deviation.
c) Either a normal population or a large sample (n ≥ 30).
d) The population must be at least 10 times to the size of the sample.

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