endent samples of different sizes, say n1 and n2>>n1 (n2 is much bigger than n1), used to perform inference on mu1-mu2 (or p1-p2). Which sample does (usually) contribute more to the random error? Since the random error is measured by the standard error (SE), use the SE formula (either for mu1-mu2 or p1-p2) to explain.

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