Which of the following is not a measure of central tendency? question 7 options:
a. mode
b. range
c. mean
d. median

b. range
mode is the most frequent value
median is the "midpoint" value: half the values are greater than it, half are less 
mean is the average
range, however, is just the difference between the largest and smallest number; it says nothing about how "centered" the data is

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.