Hospitals must keep enough antibiotics on hand to treat infection diseases . Researchers want to determine whether the infectious disease rate Is higher in some months than in others To find out, researchers took a sample of 192 hospital patients in January and found 32 were being 4 treated for infectious disease. In an independent sample of 403 patients admitted in May, 34 were treated for an infectious disease Find ! a 90 % confidence interval for the differences in the infectious disease admission rates in january and in May A al 4 (. 033, . 133 ) B (. 013 , , 198 ) ( . 066, . 179 ) NEW ( . 035 , . 153)