Which one of the following is a condition when sampling distribution of mean is not normal ?

[A] Population distribution is normal and sample size is more than 30

[B] Population distribution is not normal and sample size is small (< 30)

[C] Population distribution is not normal but sample size is large (> 30)

[D] Population distribution is normal and sample size is less than 30

Answer & Explanation
Answer: Population distribution is not normal and sample size is small (< 30)

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