Which of the following data sets has the smallest range?
a {148, 145, 117, 148, 199, 172}
b {324, 318, 367, 312, 389, 337}
c {50, 30, 10, 0, 80, 100}
d {37, 19, 40, 54, 75, 68}
c {50, 30, 10, 0, 80, 100} has the smallest range. The range is the difference between the largest and smallest values in the set. In this case, the largest value is 100 and the smallest is 0, so the range is 100 - 0 = 100. In the other sets, the ranges are:
a: 199 - 117 = 82
b: 389 - 312 = 77
d: 75 -19 = 56