View Original: | State Route 20 2008.png (734x559) | |||
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Keywords: State Route 20 2008.png 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 Own 2009 02 08 Walter Siegmund <gallery>File State_Route_20 png</gallery> Probability plots Washington State Route 20 |