Answer
(a) III
(b) I
(c) IV
(d) II
Work Step by Step
(d) has mean and median equal to 60. So (d) - II
(a), (b), (c) have mean and median equal to 53. But, $σ_b\lt σ_a\lt σ_c$; that is, the values in (b) are closer to 53 than in (a) and the values in (a) are closer to 53 than in (c). So, (a) - III, (b) - I and (c) - IV
