In the general population,patients who are recovering from bronchial pneumonia normally take amean(average)of4.75daystoleave the hospital,with apopulation standard deviationof1.82days.Medicalpersonnel at a hospital are trying a newmedication that is designed to ease breathing during recovery.What is not currently known is whether the new medication willimpact duration of hospital stay.The first sampleof25patients(n=25)towhom this medication was administered werereleased from the hospital in amean(average)of2.60days.Basedon this result,should the hospital conclude that there isa significant differencein duration of hospital stay because of the new medication?

The most appropriate null hypothesis (in symbols) would be:

_newmed= 4.75

_newmed= 2.60

_newmed> 2.60

_newmed>4.75

_newmed< 2.60