The data in the Problem 9 worksheet of the “Data” file provides the process time

Question

The data in the Problem 9 worksheet of the “Data” file provides the process times in minutes for two production lines.

      a. Prove (99% confidence level) if there is a difference between the two production lines in terms of process times.

      b. What sample size would be necessary to prove this to an accuracy of 1 minute?

91.69204 83.9976 89.09504 82.65706 86.54122 84.37234 91.2936 87.66138 93.67638 82.64245 94.94638 91.94605 89.80999 85.17552 92.4154 83.27475 83.87191 82.63522 90.08731 83.61619 86.71173 86.7923 85.86476 84.24228 82.93274 80.93133 91.66162 86.84652 85.69085 87.13719 87.02281 91.14318 92.94165 85.10538 91.95518 79.59965 91.01757 83.17318 86.73094 83.58113 89.61989 87.87555 83.24112 84.14444 87.50018 85.86883 83.64838 87.616 92.80566 82.5627 90.40498 84.94783 91.99726 83.31513 88.38015 90.08862 83.87215 85.34387 84.21685 89.4826 83.86058 86.81616 94.91859 82.68625 89.4456 84.07942 87.56115 85.33787 91.25636 80.70363 91.80579 86.98817 93.86392 83.43024 91.874 81.89271 87.23189 84.39192 89.90575 86.93654 90.18453 83.36951 90.00755 84.35414 85.98736 84.51248 89.8903 82.45688 86.41519 82.29486 91.58967 87.64585 93.92207 84.52482 95.50023 90.23358 93.21881 85.71366 88.05002 83.92523

Explanation / Answer

The data in the Problem 9 worksheet of the “Data” file provides the process time

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