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最近我校对高一学生入学一学期后的学习生活适应情...

One possible version: Recently, a survey has been carried out in our school whether the freshmen has become used to the life in senior high school. As can be seen from the result of the survey, opinions are divided. About 60% ...

(1)由茎叶图,得甲班的10名同学的身高分别为182 179 179 171 170 168 168 163 162 158,乙班的10名同学的身高分别为181 170 173 176 178 178 162 165 168 159,∴.x甲=170,.x乙=171,∴乙班男生的平均身高较高;(2)样本方差为110[(182-170...

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