The Mann-Whitney test is definitely used to compare medians, not means. It's a good nonparametric alternative when the assumptions for a t-test aren't met. I feel pretty confident I can answer this one correctly.
I'm pretty lost on this one. I can never remember the difference between the Mann-Whitney test and the t-test. I guess I'll just have to make an educated guess and hope for the best.
Okay, let me think this through. The Mann-Whitney test is a nonparametric test, so it doesn't assume the data follows a normal distribution. It's used to compare the distributions of two independent samples, not just the means. I think the key is remembering it's about medians, not means.
Hmm, I'm a bit unsure about this one. I thought the Mann-Whitney test was for comparing means, but now I'm second-guessing myself. I'll need to review my notes to be sure.
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