Question: According to Strategic Finance, Medtronic, Inc., recently applied two quality improvement methods to its global finance operations. The two methods were aimed at reducing the cycle time of an operation. The following data are time, in seconds, for the operation, using Method A and Method B.
Method A: 477 482 471 419 470 410
Method B: 453 469 450 423 472 425
Is there statistical evidence that one method is better than the other?