3) The heights of 10 girls are 127 cm, 146 cm, 145 cm, 125 cm, 130 cm, 136 cm, 140 cm, 124 cm, 135 cm and
143 cm. Find:
(i) the height of the tallest girl.
(ii) the height of the shortest girl.
(iii) the range of the girls' heights.
(iv) the mean height of the group.
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Answer:
Height of the tallest girl = 151 cm.
Height of the shortest girl = 128 cm.
Range = (151 − 128) cm. = 23 cm.
Mean height = =
The heights of 5 girls are greater than the mean height (i.e., 141.4 cm) and these heights are 143, 146, 149, 150, and 151 cm
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