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某年某市 120 名 12 岁健康男孩身高 (cm) 测量资料
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142.3 156.6 142.7 145.7 138.2 141.6 142.5 130.5 132.1
135.5
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134.5 148.8 134.4 148.8 137.9 151.3 140.8 149.8 143.6
149.0
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145.2 141.8 146.8 135.1 150.3 133.1 142.7 143.9 142.4
139.6
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151.1 144.0 145.4 146.2 143.3 156.3 141.9 140.7 145.9
144.4
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141.2 141.5 148.8 140.1 150.6 139.5 146.4 143.8 150.0
142.1
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143.5 139.2 144.7 139.3 141.9 147.8 140.5 138.9 148.9
142.4
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134.7 147.3 138.1 140.2 137.4 145.1 145.8 147.9 146.7
143.4
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150.8 144.5 137.1 147.1 142.9 134.9 143.6 142.3 143.3
140.2
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125.9 132.7 152.9 147.9 141.8 141.4 140.9 141.4 146.7
138.7
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160.9 154.2 137.9 139.9 149.7 147.5 136.9 148.1 144.0
137.4
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134.7 138.5 138.9 137.7 138.5 139.6 1 43.5 142.9 146.5
145.4
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129.4 142.5 141.2 148.9 154.0 147.7 152.3 146.6 139.2
139.9
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R=160.9–125.9=35
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I=R/10=35/10=3.5, 取整 I=4.0
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