Question: Historically the mean time required to complete a process at a factory has been 8 minutes. Employees of this factory have recently undergone additional

Historically the mean time required to complete a process at a factory

Historically the mean time required to complete a process at a factory has been 8 minutes. Employees of this factory have recently undergone additional training to increase the efficiency of product processing. A recent random sample of processes at this factory revealed a sample mean of 7.8 minutes. The appropriate alternative hypothesis for testing increased efficiency would be: Ha:

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