Question

Nine observations were randomly selected from population A and eight observations were randomly selected from population B. The populations are not necessarily normally distributed. Use the 0.05 significance level, a two-tailed test, and the Wilcoxon rank-sum test to determine whether there is a difference between the two populations. (Round your answers to 1 decimal place.)

Population A:	12	14	15	19	23	29	33	40	51
Population B:	13	16	19	21	22	33	35	43

State the decision rule. Use the 0.05 significance level. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)

H₀: The distributions are the same.
H₁: The distributions are not the same.

Reject H0 If Z<________ or Z> ___________

#please explain why the answer is (1.96) and 1.96, and what you use to find?

Answer 1