頁籤選單縮合
題名 | Bradford Curves, Cumulative Rank-Frequency Distributions and a Goodness-of-Fit Test= |
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作者 | Rousseau, Ronald; |
期刊 | 資訊傳播與圖書館學 |
出版日期 | 20000300 |
卷期 | 6:3 2000.03[民89.03] |
頁次 | 頁1-10 |
分類號 | 011.016 |
語文 | eng |
關鍵詞 | 書目計畫分佈; 布萊德福曲線; 累積次序頻率分佈; 勞倫茲曲線; 擬合度檢驗; 奇尼指標; 偏垂; Bibliometric distribution; Bradford curves; Cumulative rank-frequency distribution; Lorenz curves; Goodness-of-fittest; Gini index; Groos droop; |
英文摘要 | We propose a goodness-of-fit test for cumulative rank-frequency distribution (Bradford curves). As the test is based on the correspondence of Gini indices and not on the curves themselves we lose information. Hence we refer to the procedure as a weak test. Confidence intervals for observed Gini indices are drawn using the jackknife estimator for the variance. Techniques qre illustrated by testing the fit for 30 data sets. This clearly illustrates that the equation |
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