The New Land Food Corporation is considering retiring 10 machines. For replacement, it can order some machines of the same model or it can switch to the new model. The company has decided to try out one of the new machines before it makes a large investment in many of them. The daily productivity figures for the new machine and an old machine for the last 12 working days are recorded in the following table. Do a test to determine whether the new machine is better. Use 5 percent.

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Day 1 New 23 Old 21 2 21 17 3 34 32 423 5 6 34 33 24 7 22 29 34 8 152 9 32 21 33 23 23 34 10 11 12 232 34 33