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Under what conditions are the Wilcoxon rank sum test and the Mann-Whitney U test used to analyze the relationship between two variables?
Net Energy Ratio
A measure comparing the amount of energy delivered by a system to the amount of energy used in its construction and maintenance.
Petrochemicals
Chemical products derived from petroleum or natural gas, serving as raw materials in various manufacturing processes.
Organic Chemicals
Compounds containing carbon atoms, typically produced by living organisms but can also be synthesized artificially.
Net Energy Ratio
The ratio of the amount of useful energy produced by an energy system to the amount of energy expended to produce it.
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