Question: A production process is working normally if the average weight of manufactured steel is at least 1.3 pounds. A sample of 50 steel bars yields

A production process is working normally if the average weight of manufactured steel is at least 1.3 pounds. A sample of 50 steel bars yields a mean of 1.26 pounds and standard deviation of 0.10 pounds. Is there any evidence to indicate that the production process needs adjustment? Use a 0.05 level of significance. Interpret your conclusion in the context of the problem.

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