What is the null hypothesis in the Mann-Whitney U test?
- The groups have different variances
- The groups have equal variances
- There is a significant difference between the groups
- There is no significant difference between the groups
In the Mann-Whitney U test, the null hypothesis is that there is no significant difference between the groups. More specifically, it states that the probability that a randomly selected value from the first group is greater than a randomly selected value from the second group is equal to 0.5.
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