What happens when you reject the null hypothesis in a Mann-Whitney U test?
- You conclude that the distributions are normal
- You conclude that the groups have equal variances
- You conclude that there is a difference between the groups
- You conclude that there is no difference between the groups
When you reject the null hypothesis in a Mann-Whitney U test, you conclude that there is a difference between the groups. More specifically, it means that it is unlikely that a randomly selected value from the first group is greater than a randomly selected value from the second group with a probability of 0.5.
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