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When a robotic welder is in adjustment, its mean time to perform its task is 1.3250...

When a robotic welder is in adjustment, its mean time to perform its task is 1.3250 minutes. Past experience has found the population standard deviation of the cycle time to be 0.0396 minutes. An incorrect mean operating time can disrupt the efficiency of other activities along the production line. For a recent random sample of 80 jobs, the mean cycle time for the welder was 1.3229 minutes. Does the machine appear to be in need of adjustment (i.e., perform a hypo test)

Math   Statistics-And-Probability   
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