Suppose 12 urban households and 12 rural households are selected randomly and each family is asked to report the amount spent on food at home annually. Th e results follow. Use a Mann–Whitney U test to determine whether there is a signifi cant diff erence between urban and rural households in the amounts spent for food at home. Use  0.05. Urban Rural Urban Rural £2,110 £2,050 £1,950 £2,770 2,655 2,800 2,480 3,100 2,710 2,975 2,630 2,685 2,540 2,075 2,750 2,790 2,200 2,490 2,850 2,995 2,175 2,585 2,850 2,995