Question

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?

Answer 1

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.