2描述統(tǒng)計(jì)1：表格法和圖形法(已修改)
2025-03-21 14:28 本頁(yè)面
【正文】 College of Management Descriptive Statistics Ⅰ: Tabular and Graphical Methods 描述統(tǒng)計(jì) Ⅰ ：表格法和圖形法 Chapter 2 College of Management 主要內(nèi)容 ? Summarizing Qualitative Data 品質(zhì)數(shù)據(jù)匯總 ? Summarizing Quantitative Data 數(shù)量數(shù)據(jù)匯總 ? StemandLeaf Display 莖葉顯示 ? Crosstabulations and Scatter Diagrams 交叉分組列表和散點(diǎn)圖 College of Management Summarizing Qualitative Data 品質(zhì)數(shù)據(jù)匯總 ? Frequency Distribution 頻數(shù)分布 ? Relative Frequency Distributions and Percent Frequency Distributions 相對(duì)頻數(shù)分布和百分?jǐn)?shù)頻數(shù)分布 ? Bar Graph and Pie Chart 條形圖和餅形圖 College of Management 頻數(shù)分布： 按數(shù)據(jù)的品質(zhì)標(biāo)志分組，全部數(shù)據(jù)在各組中的分配狀況稱為頻數(shù)分布。 按品質(zhì)標(biāo)志分組就是按事物的性質(zhì)分組，例如人口按性別、民族、職業(yè)分組；工業(yè)企業(yè)按所有制、經(jīng)濟(jì)部門(mén)、管理系統(tǒng)分組等。 頻數(shù)： 分配在各組中的數(shù)據(jù)個(gè)數(shù)稱為頻數(shù)。 Frequency Distribution 頻數(shù)分布 College of Management 20位顧客對(duì)飯店服務(wù)質(zhì)量的評(píng)價(jià) : Below Average Average Above Average Above Average Above Average Above Average Above Average Below Average Below Average Average Poor Poor Above Average Excellent Above Average Average Above Average Average Above Average Average Example: College of Management Frequency Distribution Table 頻數(shù)分布表 Rating Frequency Poor 2 Below Average 3 Average 5 Above Average 9 Excellent 1 Total 20 College of Management Relative Frequency and Percent Frequency Distributions 相對(duì)頻數(shù) (頻率 )分布和百分?jǐn)?shù)頻數(shù)分布 ? 相對(duì)頻數(shù) (頻率 ) : 各組頻數(shù)與全部頻數(shù)之和的比值稱為 相對(duì)頻數(shù) (頻率 )。 ? 百分?jǐn)?shù)頻數(shù) 是相對(duì)頻數(shù)乘 100 College of Management Example: Relative Percent Rating Frequency Frequency Poor 10 Below Average 15 Average 25 Above Average 45 Excellent 5 Total 100 College of Management Bar Graph 條形圖 ? 條形圖是描述在一個(gè)頻數(shù)、相對(duì)頻數(shù)或百分?jǐn)?shù)頻數(shù)分布中匯總的品質(zhì)數(shù)據(jù)的圖形方法 ? 在圖形的橫軸為每一組別的標(biāo)記 ? 縱軸為頻數(shù)、相對(duì)頻數(shù)、百分?jǐn)?shù)頻數(shù) ? 用固定寬度的條繪制每一標(biāo)記，擴(kuò)展條的高度達(dá)到用縱軸上表示的各組別的頻數(shù)、相對(duì)頻數(shù)或百分?jǐn)?shù)頻數(shù) ? 條形相對(duì)獨(dú)立以強(qiáng)調(diào)每一類是一獨(dú)立的事實(shí) College of Management Example: Bar Graph 條形圖 1 2 3 4 5 6 7 8 9 Poor
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