A researcher is recruiting participants for a study of a new drug. in order to qualify for the study, participants must have a (bmi) score between 25 and 30. if she screens 250 people and finds out that the group of participants scored 28.4 ± 1.6 (m ± sd). if bmi is normally distributed, what percentage of participants should score between 25 and 30? how many participants does this represent?