4. Researchers estimated the standard deviation of a set of data to be 13.4. Which set of data was
used to calculate this standard deviation?
a. 3, 5, 8, 9, 9, 10, 12, 15, 17
b. 31, 48, 52, 55, 61, 78, 82, 98, 104
c. 57, 62, 65, 71, 74, 83, 89, 91, 93
d. 72, 76, 79, 83, 90, 91, 94, 97, 99
e. I don't know the answer