Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [archaeology]

Study of human activity through the recovery and analysis of material culture. [Wikipedia]

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In PCA, is there a systematic way of dropping variables to maximise the segregation of two populations?

I am trying to investigate using principal component analysis whether it is possible to guess with good confidence from which population ("Aurignacian" or "Gravettian") a new datapoint came from. A datapoint is described by 28 variables, most of…
Pertinax
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Under what conditions is Welch's unequal variance t-test more conservative than Student's equal variance t-test?

I am comparing the anatomy of two Neanderthal populations for which sample sizes, the number of available bones, is low (usually between 3 and 8 for a given trait). I am using Welch's unequal variance t-test because I have no reason to believe that…
Pertinax
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What's a good measure of distance between multinomial samples to build a phylogenetic tree?

Summary: I'm looking for a measure of distance between multinomial samples of four or more categories in order to build a phylogenetic tree. I considered using log(1/CHI2(sample-1, sample-2)), where CHI2 gives the p-value of the chi-square test…
Pertinax
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How can one test for a difference in the means of two log-normal samples without log-transforming?

I'm reading a scientific article that's investigating whether some prehistoric human populations had differently shaped long bones. The methods are as follows: Define 21 features of arm long bones. For example, the "robusticity index" is defined as…
Pertinax
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Significance of single classification change across multiple time slices (archaeology)

I'm trying to determine if I'm correctly testing for significance of the change in artifact type presence across several time periods. In an archaeological survey, stone tool artifacts were cataloged (let's say n=1000) . Within the whole population,…
davehunt00
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Vector Autoregression for archaeological time series of cultural traits

I have a dataset that contains information about the prevalence of two mutually exclusive cultural traits over time in different study regions. Imagine it to look somehow like this (in a tall format): | region | year | trait | proportion…
nevrome
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Betabinomial (BB) regression in the gamlss package (R)

I'd be grateful for any help with beta-binomial (BB) regression in the gamlss package: predictions from the fitted model of "mu" values for each observation in my data seem reasonable. But the predictions for the "sigma" values do not. exampleData…
Fraser
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