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Performance of two independent groups of participants

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Assume a researcher compared the performance of two independent groups of participants on an ordinal variable using the Mann-Whitney U test. The first group had 8 participants and the second group had 11 participants.

a. Using a p level of 0.05 and a two-tailed test, what is the critical value?

b. Assume the researcher calculated U1 = 22 and U2 = 17. Make a decision regarding the null hypothesis and explain that decision.

c. Assume the researcher calculated U1 = 24 and U2 = 30. Make a decision regarding the null hypothesis and explain that decision.

d. Assume the researcher calculated U1 = 13 and U2 = 9. Make a decision regarding the null hypothesis and explain that decision.

Reference no: EM131747616

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