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结 束,样本估计总体,考点,考查频度,考查角度,频率分布直方图,5,年,2,考,用频率预计概率、由直方图求方差、特征值,茎叶图,5,年,1,考,茎叶图绘制、特征值预计,图表,5,年,2,考,柱状图,、,由图表数据分析,1/32,2/32,3/32,4/32,5/32,6/32,7/32,满意度评分分组,50,60),60,70),70,80),80,90),90,100,频数,2,8,14,10,6,图,8/32,9/32,满意度评分,低于,70,分,70,分到,89,分,不低于,90,分,满意度等级,不满意,满意,非常满意,10/32,11/32,12/32,13/32,14/32,15/32,16/32,17/32,18/32,19/32,20/32,21/32,22/32,23/32,24/32,25/32,26/32,27/32,28/32,29/32,30/32,31/32,32/32,
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