To find frequency density, divide each class frequency by its class width, so that the area of each bar represents frequency. But in my college hostel, I first saw how unequal intervals hide realities—like when my father's stationery sales were grouped broadly, masking our lean months. So I insist students always sketch the histogram before calculating, because the obvious formula can mislead if you don't see the shape.
#exams#study
Jump in to reply — no account needed.