File:State Route 20.png
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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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| Date | |||
| Source | Own work | ||
| Author | Walter Siegmund | ||
| Permission (Reusing this file) |
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:07, 14 November 2021 | | 1,088 × 726 (41 KB) | Wsiegmund | Added data through fall 2021 |
| 01:01, 17 January 2015 |  | 1,080 × 720 (31 KB) | Wsiegmund | Plotted data from fall 1972 through 2014. | |
| 23:20, 29 March 2013 |  | 1,080 × 720 (31 KB) | Wsiegmund | Plotted data from fall 1972 through 2012. | |
| 17:04, 16 October 2007 |  | 668 × 529 (60 KB) | Wsiegmund | {{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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