A small bakery sells cookies in packages of 500 g. The cookies are handmade and the packaging is either done by the baker himself or his wife. Some customers conjecture that the wife is more generous than the baker. One customer does an experiment: he buys packages of cookies packed by the baker and his wife on 16 different days and weighs the packages. He gets the following two samples (one for the baker, one for his wife). Weight (wife) (X) 512 530 | 498 540 521| 528 505 523 Weicht (hel 400 500 510 405 515 50? 400 LS11

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A:

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