Multiple Choice
If the underlying populations cannot be assumed to be normal, then by the central limit theorem, the sampling distribution of 1 -
2 is approximately normal only if both sample sizes are sufficiently large-that is, when ________.
A) n1 + n2 = 30
B) n1 + n2 ≥ 30
C) n1 = 30 and n2 = 30
D) n1 ≥ 30 and n2 ≥ 30
Correct Answer:

Verified
Correct Answer:
Verified
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