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MMLU / The sampling distribution of the sample mean is close to the normal distribution

Problem

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question

The sampling distribution of the sample mean is close to the normal distribution

choices

  1. only if both the original population has a normal distribution and n is large.
  2. if the standard deviation of the original population is known.
  3. if n is large, no matter what the distribution of the original population.
  4. no matter what the value of n or what the distribution of the original population.

subject

high_school_statistics

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Source and history

Official source

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