Need help with some HW: Management of the Sycamore Steel Company wishes to determine if there is any difference in performance between the day and night shift workers. They randomly sample a group of 40 day-shift workers and found a mean output of 62 parts per hour with a standard deviation of 9 parts per hour. A random sample of 30 night shift workers found an output of 67 parts per hour and a standard deviation of 8 parts per hour. At the 0.05 level of significance is there a difference between the day and night shift works?

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