Question: If the underlying populations cannot be assumed to be normal, then by the central limit theorem, the sampling distribution of xbar1-xbar2 is approximately normal only

If the underlying populations cannot be assumed to be normal, then by the central limit theorem, the sampling distribution of xbar1-xbar2 is approximately normal only if both sample sizes are sufficiently largethat is, when _________ .

Multiple Choice

n₁+n₂= 30
n₁= 30andn₂= 30
n₁+n₂ 30
n₁ 30andn₂ 30

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