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 weights above the mean weight?
(c) Find the range of the given data.
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Answer:
Rearranging the data into ascending order, we get
54,57,59,60,62,62,62,65,70,75,84
Here,
(a) Mean = Sum of observations ÷ number of observations
=
12
54+54+57+59+60+62+62+62+65+70+75+84
=
12
788
=65.6 kg
(b) 4 people have a weight above the mean weight.
(c) Range = greatest observation − lowest observation
=84−54=30 kg
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