The following are weights (in kg) of 12 people: 70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60.
(a) Find the mean of the weights of the people.
(b) How many people weigh above the mean weight?
(c) Find the range of the given data.
(a) 65.6
(b) 4
(c) 30
(a) Mean = (Sum of weights)/12 = 787/12 = 65.6.
(b) People above mean: 70, 75, 78, 84 → 4.
(c) Range = 84 − 54 = 30.