Question
Asked Nov 18, 2019
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when comparing the means of samples from two normally distributed populations, if the samples are independent and the population variences are known, the z test can be used.

A). true

B). false

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Expert Answer

Step 1

Conditions for using z-test is,

  • The samples are randomly selected.
  • The samples are independent.
  • Sample size for each sample is greater than 30.
  • Or ...

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Tagged in

Math

Statistics

Hypothesis Testing

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