Nutrition record the dietary fat intake (in grams per day) for 200 subjects in a study and display the information in the histogram. How many students have dietary fat in take ranging from 80 up to 100 grams per day?
From the picture, the relative frequency from 80 up to 100 grams per day is 0.18. Given that there are a total of 200 students, 0.18*200 = 36 of them have dietary fat in take ranging from 80 up to 100 grams per day.
