Q2. Observation from two random and independent samples, drawn from population 1 and 2, are given below. Use the Wilcoxon rank sum test to determine whether population I is shifted to the left of population 2. Sample 1 Sample 2 (1) State the null and alternative hypotheses to be tested. 33 61 20 19 40 26 36 65 25 35 (2) Rank the combined sample from smiallest to largest. Calculate T,. T (3) What is the rejection at a = 0.05? (4) State your conclusion.

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