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Hypothesis Testing: Considering the Wilcoxon Test

It has been suggested that daily production of a subassembly would be increased if better portable lighting were installed and background music and free coffee and doughnuts were provided during the day. Management agreed to try the scheme for a limited time. The number of subassemblies produced per week by a sample of employees is attached. Using the Wilcoxon signed-rank test, determine whether the suggested changes are worthwile.
a. state the null hypothesis
b. decide on the alternative hypothesis
c. decide on the level of significance
d. state the decision rule
e. compute t and arrive at a decision

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It has been suggested that daily production of a subassembly would be increased if better portable lighting were installed and background music and free coffee and doughnuts were provided during the day. Management agreed to try the scheme for a limited time. The number of subassemblies produced per week by a sample of employees is attached. Using the Wilcoxon signed-rank test, determine whether the suggested changes are worthwile.
a. state the null hypothesis
b. decide on the alternative hypothesis
c. decide on the level of significance
d. state the decision rule
e. compute t and arrive at a decision

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