Analyze data with a mann whitney test

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Reference no: EM131396034

Grackles, commonly referred to as blackbirds, are hosts for a parasitic worm that lives in the tissue around the brain. To see if the incidence of this parasite was changing, 24 blackbirds were captured and the number of brain parasites in each bird was recorded. These data were compared with the infestation of 16 birds captured from the same place 10 years earlier.

Analyze the data with a Mann-Whitney test and write a conclusion. Be careful and systematic in assigning ranks. Errors here are quite frustrating.

Present day
20	16	12	11	51	8	23	68	23	44	0	78
0	28	53	20	44	20	36	32	64	16	101	0

Ten years earlier
16	19	43	90	16	72	29	62
103	39	70	29	110	32	87	57

Reference no: EM131396034

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