File:State Route 20 2008.png

State_Route_20_2008.png(734 × 559 pixels, file size: 14 KB, MIME type: image/png)

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English: Q-Q plot for Washington State Route 20 (North Cascades Highway) first opening/final closing dates. Data are from fall 1972 through 2008. I ignored the winter of 1976-1977 when the highway did not close. A normal distribution would be a straight line in this plot. http://www.wsdot.wa.gov/Traffic/Passes/NorthCascades/closurehistory.htm
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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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Date/TimeThumbnailDimensionsUserComment
current06:14, 19 February 2010Thumbnail for version as of 06:14, 19 February 2010734 × 559 (14 KB)Wsiegmund (talk | contribs)Enlarged text and symbols for readability in thumbnails
18:38, 8 February 2009Thumbnail for version as of 18:38, 8 February 2009720 × 540 (9 KB)Wsiegmund (talk | contribs)== Summary == {{Information |Description=Probability chart for Washington State Route 20 (North Cascades Highway) first opening/final closing dates. Data are from fall 1972 through 2008. I ignored the winter of 1976-1977 when the highway did not close

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