A new assembly-line procedure to increase production has been suggested by Mr. Mump. To test whether the new procedure is superior to the old procedure, a random sample of 15 assembly-line workers was selected. The number of units produced in an hour under the old procedure was determined, then the new Mump procedure was introduced. After an appropriate break-in period, their production was measured again. The results were:

At the .05 significance level, can we conclude the production is greater using the Mump method?
a. State the null and alternate hypotheses.
b. State the decision rule.
c. Arrive at a decision regarding the nullhypothesis.

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Production Production Employee Old System Mump Method Employee Old System Mump Method 60 40 59 30 70 78 43 40 64 52 58 37 71 83 46 52 87 80 56 21 84 80 57 21 108 56 62 50 56