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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 Surgeon 1 Surgeon 2 Surgeon 3 Surgeon 4 Surgeon 5 28 59 Old way 32 New 38 63 32 41 32 31 45 way Click here for the Excel Data File (a-1) Calculate the difference between the new and the old ways for the data given below. Use α = O.025. (Negative values should be indicated by a minus sign.) 2 X1- X2 Surgeon Old Way New WayDifference 0 32 59 28 38 63 32 2 3 4 32 45 18 (a-2) Calculate the mean and standard deviation for the difference. (Round your mean answer to 1 decimal place and standard deviation answer to 4 decimal places.) Mean Standard Deviation 7.8 10.1094 (a-3) Choose the right option for Ho:d s 0; H:Hd O Reject if tcalc> 2.776445105 Reject if tcalc 2.776445105 (a-4) Calculate the value of tcalc. (Round your answer to 4 decimal places.) (b-1) Is the decision close? (Round your answer to 4 decimal places.) The decision is not close The p-value is

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Xi-X1 59 28 3 8 63 41 3 2 31 1 8 -4 7 18 Standard Deistrm : uu Excel ond も17 2.116

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