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Using seriation at our hypothetical junkyard sites, we will try to establish the chronology--the order in which the junkyards were used and closed.To start out, we will take a sample of the deposits in each of junkyards.The figure on this page is a Microsoft Excel (TM) table showing the results of our frequency count.Our next step is to create a bar graph of the percentages of the objects in our junkyard samples.Next, we break apart the bars and align them so that all of the same colored bars are positioned vertically next to the others.

You might find a small number of 78s for a long period after they were pretty much done.We don't have historical information about the junkyards--they were illegal dumping areas and no county records have been kept on them.For a study we're doing on, say, the availability of music in rural locations during the 20th century, we'd like to know more about the deposits in these illicit junkyards.The same is true for 45s, and 8-tracks, and cassette tapes, and LPs, and CDs, and DVDs, and mp3 players (and really, any kind of artifact).For this seriation demonstration, we're going to assume that we know of six junkyards (Junkyards A-F), scattered in the rural areas around our community, all dated to the 20th century.

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