User Tools

Site Tools


sum_of_individual_weighted_means

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
sum_of_individual_weighted_means [2007/05/26 18:00]
127.0.0.1 external edit
sum_of_individual_weighted_means [2007/08/02 23:52]
steko (new) references go into footnotes
Line 1: Line 1:
 ====== 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 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. ​
Line 8: Line 8:
 ===== 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)