Firstly, from our survey conducted on 30 people, we have found out that 15 respondents are underweight, 11 are underweight, 3 are overweight, 1 is Severely-overweight.
Lastly, from the survey, we found out that on average respondents exercise 4 times a week.
The results are available at this link: http://tinyurl.com/a6ow4wr
This graph shows the BMI status of the 30 students (aged 13-16). 11 are healthy, 15 are under-weight and 4 are overweight.
The results show that the average(mean) BMI is 19.2(3s.f). Although the average BMI is healthy, many of them are actually underweight.