File:State Route 20.png

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

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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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Author Walter Siegmund
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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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Date/TimeThumbnailDimensionsUserComment
current05:07, 14 November 2021Thumbnail for version as of 05:07, 14 November 20211,088 × 726 (41 KB)Wsiegmund (talk | contribs)Added data through fall 2021
01:01, 17 January 2015Thumbnail for version as of 01:01, 17 January 20151,080 × 720 (31 KB)Wsiegmund (talk | contribs)Plotted data from fall 1972 through 2014.
23:20, 29 March 2013Thumbnail for version as of 23:20, 29 March 20131,080 × 720 (31 KB)Wsiegmund (talk | contribs)Plotted data from fall 1972 through 2012.
17:04, 16 October 2007Thumbnail for version as of 17:04, 16 October 2007668 × 529 (60 KB)Wsiegmund (talk | contribs){{Information |Description=Probability chart for Washington State Route 20 (North Cascades Highway) first opening/final closing dates. Data are from fall 1972 to spring 2007 inclusive. I ignored the winter of 1976-1977 when the highway did not close.

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