Eleven cities are ranked according to their pollution levels and occurrence of pulmonary discases. City Pollution Pulmonary diseases A45 : A B B74 7 4 C 9 160 7 D13 E21 E F G H I 10 11 5 10 632 -68 J K 8 11 6 9 Is there any relation between pollution and occurrence of pulmonary diseases? Comment on the findings.?