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File:State Route 20.png

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Original file ‎(1,088 × 726 pixels, file size: 41 KB, MIME type: image/png)

Summary

Description
English: A Q–Q plot for Washington State Route 20 (North Cascades Highway) first opening/final closing dates. Data are from fall 1972 to fall 2021 inclusive.[1] I ignored the winter of 1976-1977 when the highway did not close. A normal distribution would be a straight line in this graph.
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Source Own work
Author Walter Siegmund
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inception

16 January 2015

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Date/TimeThumbnailDimensionsUserComment
current09:07, 14 November 2021Thumbnail for version as of 09:07, 14 November 20211,088 × 726 (41 KB)wikimediacommons>WsiegmundAdded data through fall 2021
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