sum_of_individual_weighted_means
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| ====== Sum of individual weighted means ====== | ====== Sum of individual weighted means ====== | ||
| - | This method is described in detail in the paper by Nicola TERRENATO and Giovanni RICCI, //I residui nella stratificazione urbana. Metodi di quantificazione e implicazioni per l'interpretazione delle sequenze: un caso di studio dalle pendici settentrionali del Palatino//, in "I materiali residui dello scavo archeologico", edited by Federico GUIDOBALDI, Carlo PAVOLINI and Philippe PERGOLA, Roma, École Française de Rome, 1998. | + | This method is described in detail in a paper by Terrenato and Ricci((Nicola TERRENATO and Giovanni RICCI, //I residui nella stratificazione urbana. Metodi di quantificazione e implicazioni per l'interpretazione delle sequenze: un caso di studio dalle pendici settentrionali del Palatino//, in "I materiali residui dello scavo archeologico", edited by Federico GUIDOBALDI, Carlo PAVOLINI and Philippe PERGOLA, Roma, École Française de Rome, 1998.)). |
| This is useful for calculating a correct frequency in time-based series, because archaeological classes of objects can have long-time spans. The simplistic use of the central date of the timespan can give very different results when you want to obtain a time distribution for a class of artefacts. | This is useful for calculating a correct frequency in time-based series, because archaeological classes of objects can have long-time spans. The simplistic use of the central date of the timespan can give very different results when you want to obtain a time distribution for a class of artefacts. | ||
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| ===== Ancient shipwrecks of the Mediterranean ===== | ===== Ancient shipwrecks of the Mediterranean ===== | ||
| - | The method has been used to obtain significative distributions of frequency for data coming from the catalogue //Ancient Shipwrecks of the Mediterranean// by A.J. Parker. The author gives some distribution graph, but he's using central dates from ceramic assemblages rather than a weighted mean of each shipwreck's time range. | + | The method has been used to obtain significative distributions of frequency for data coming from the catalogue //Ancient Shipwrecks of the Mediterranean// by A.J. Parker. The author gives some distribution graph, but he's using central dates from ceramic assemblages rather than a weighted mean of each shipwreck's time range((This technique has first been applied to Parker's catalogue in Enrico ZANINI, //Ricontando la terra sigillata africana//, in «Archeologia Medievale» 23, 1996, p.677.)). |
| {{ parkercomparison.png?300|Comparison between the two methods}}Comparison between the "simple" method using central date and the more sophisticated one based on the sum of individual weighted means. The difference is remarkable. | {{ parkercomparison.png?300|Comparison between the two methods}}Comparison between the "simple" method using central date and the more sophisticated one based on the sum of individual weighted means. The difference is remarkable. | ||
sum_of_individual_weighted_means.txt · Last modified: 2018/08/04 00:01 (external edit)
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