Latin American Archaeology Database, University of Pittsburgh
URL: http://www.pitt.edu/~laad
Email: laad@pitt.edu
Wankarani Settlement Dataset
Timothy L. McAndrews
 
 Wankarani Artifact Density Confidence Levels  --  WART.TXT

The data file WART.TXT contains the densities and proportions of various artifact classes recovered in surface collections on Wankarani sites. Each line represents a Wankarani site. There are 17 lines, each with 29 variables separated by commas. The variables are, in the following order:

1
Site number
2
Mean sherd density (per square meter)
3
Error range at the 80% confidence level
4
Error range at the 95% confidence level
5
Error range at the 99% confidence level
6
Mean biface density (per square meter)
7
Error range at the 80% confidence level
8
Error range at the 95% confidence level
9
Error range at the 99% confidence level
10
Percentage of bifaces (among all artifacts)
11
Error range at the 80% confidence level
12
Error range at the 95% confidence level
13
Error range at the 99% confidence level
14
Mean retouch debris density (per square meter)
15
Error range at the 80% confidence level
16
Error range at the 95% confidence level
17
Error range at the 99% confidence level
18
Retouch debris to utilized bifaces ratio
19
Error range at the 80% confidence level
20
Error range at the 95% confidence level
21
Error range at the 99% confidence level
22
Mean basalt artifact density (per square meter)
23
Error range at the 80% confidence level
24
Error range at the 95% confidence level
25
Error range at the 99% confidence level
26
Mean primary production debris density (per square meter)
27
Error range at the 80% confidence level
28
Error range at the 95% confidence level
29
Error range at the 99% confidence level
 
The first line of the file, for example, looks like this:

LJ-B,19.125,±9.145,±17.765,±32.610,0.4,±0.260,±0.500,±0.924,1.688,±0.918,±1.663,±2.758,0.45,±0.737,±1.432,±2.628,0.9, ±1.380,±2.498,±4.144,4.3,±3.171,±6.160,±11.308,3.8,±2.116,±4.111,±7.547

This indicates that at site LJ-B, mean sherd density (per square meter) is 19.125; with error ranges of ±9.145 at the 80% confidence level, ±17.765 at the 90% confidence level, and ±32.610 at the 99% confidence level. The mean biface density (per square meter) is 0.4; with error ranges of ±0.260, ±0.500, and ±0.924 at the same three confidence levels. The percentage of bifaces (among all artifacts) is 1.688; ±0.918, ±1.663, and ±2.758. The mean retouch debris density (per square meter) is 0.45; ±0.737, ±1.432, and ±2.628. The retouch debris to utilized bifaces ratio is 0.9; ±1.380, ±2.498, and ±4.144. The mean basalt artifact density (per square meter) is 4.3; ±3.171, ±6.160, and ±11.308. The mean primary production debris density (per square meter) is 3.8; ±2.116, ±4.111, and ±7.547.

The last (17th) line of the file is:

B-7,20.267,±5.082,±8.635,±13.082,0.35,±0.238,±0.430,±0.714,1.498,±0.918,±1.663,±2.758,1.4,±0.536,±0.910,±1.379,5.195, ±2.006,±3.409,±5.164,4.517,±1.943,±3.301,±5.001,2.95,±1.447,±2.459,±3.726

This indicates that at site B-7, mean sherd density (per square meter) is 20.267; with error ranges of ±5.082 at the 80% confidence level, ±8.635 at the 90% confidence level and ±13.082 at the 99% confidence level. The mean biface density (per square meter) is 0.35; with error ranges of ±0.238, ±0.430, and ±0.714 at the same three confidence levels. The percentage of bifaces (among all artifacts) is 1.498; ±0.918, ±1.663, and ±2.758. The mean retouch debris density (per square meter) is 1.4; ±0.536, ±0.910, and ±1.379. The retouch debris to utilized bifaces ratio is 5.195; ±2.006, ±3.409, and ±5.164. The mean basalt artifact density (per square meter) is 4.517; ±1.943, ±3.301, and ±5.001. The mean primary production debris density (per square meter) is 2.95; ±1.447, ±2.459, and ±3.726.

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