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【考情分析】本考点主要涉及两类问题:一是用样本的频率分布估计总体的概率分布;二是用样本的数字特征(如众数、中位数、平均数、方差、标准差等)估计总体的数字特征.高考时理科一般会在填空题、选择题中出现,文科也可能在解答题中出现.难度中等偏易,属易得分题.【复习要点】(1)了解分布的意义和作用,会列频率分布表,会画频率分布直方图、频率折线图、茎叶图,理解它们
[Test analysis] The test mainly involves two types of questions: First, the frequency distribution of the sample to estimate the overall probability distribution; the second is to use the sample’s digital characteristics (such as mode, median, mean, variance, standard deviation, etc. ) Estimates of the overall digital characteristics. College entrance examination subjects will generally fill in the blank questions, multiple choice questions appear, liberal arts may also appear in the answer questions. Meaning and role, will list the frequency distribution table, will draw the frequency distribution histogram, frequency line chart, stem and leaf map, understand them