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kaan78 kaan78
  • 11-05-2024
  • Mathematics
Answered

Under which conditions can z-tests be used instead of t-tests for population means?

I. If σ is known, and sample comes from a normal distribution.

II. If σ is unknown, and the sample comes from a normal distribution

III. If σ is known, and the sample size is less than 30.

__A) Only I

__B) Only I and II

_ C) Only I and III

__D) Only II and III

Verified Answer :

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