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April 19, 2014

Homework Help: statistics

Posted by amy on Tuesday, November 29, 2011 at 12:20am.

An engineering company believes it has developed a faster way to complete the assembly of an industrial machine. The present process takes an average of 6.5 hours to complete and the times it takes to complete the process are approximately normally distributed. If the mean time for the new process is faster at the 0.05 level of significance, the engineering company will present the new process to their clients. Otherwise, the company will do further research. The company assembles a number of machines using the new process and randomly selects 17. The assembly times for the 17 machines in the sample are shown. Perform a hypothesis test showing your work.

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