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An experimental surgical procedure is being studied as an alternative to the old method. Both methods are considered safe. Five surgeons perform the operation on two patients matched by age, sex, and other relevant factors, with the results shown. The time to complete the surgery (in minutes) is recorded. (a) At 5 percent significance level, is the new way faster? State your hypothesis and show all steps clearly. (b) Is the decision close?

Surgeon 1 Surgeon 2 Surgeon 3 Surgeon 4 Surgeon 5

Old Way 36 55 28 40 62

New Way 29 42 30 32 56

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