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  2. Hours of service - Wikipedia

    en.wikipedia.org/wiki/Hours_of_service

    Motor carriers were required to give drivers 8, rather than 9, consecutive hours off-duty each day. These rules allowed for 10 hours of driving and 8 hours of rest within a 24-hour day. In 1962, for reasons it never clearly explained, the ICC eliminated the 24-hour cycle rule, and reinstated the 15-hour on-duty limit.

  3. Dot plot (statistics) - Wikipedia

    en.wikipedia.org/wiki/Dot_plot_(statistics)

    A dot chart or dot plot is a statistical chart consisting of data points plotted on a fairly simple scale, typically using filled in circles. There are two common, yet very different, versions of the dot chart. The first has been used in hand-drawn (pre-computer era) graphs to depict distributions going back to 1884.

  4. Stem-and-leaf display - Wikipedia

    en.wikipedia.org/wiki/Stem-and-leaf_display

    A stem-and-leaf display or stem-and-leaf plot is a device for presenting quantitative data in a graphical format, similar to a histogram, to assist in visualizing the shape of a distribution. They evolved from Arthur Bowley 's work in the early 1900s, and are useful tools in exploratory data analysis. Stemplots became more commonly used in the ...

  5. Box plot - Wikipedia

    en.wikipedia.org/wiki/Box_plot

    Box plot of data from the Michelson experiment. In descriptive statistics, a box plot or boxplot is a method for graphically demonstrating the locality, spread and skewness groups of numerical data through their quartiles. [1] In addition to the box on a box plot, there can be lines (which are called whiskers) extending from the box indicating ...

  6. United States Department of Transportation - Wikipedia

    en.wikipedia.org/wiki/United_States_Department...

    The flag of the U.S. Department of Transportation before 1980. The United States Department of Transportation ( USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the president of the United States and is a member of the president's Cabinet .

  7. Category:Statistical charts and diagrams - Wikipedia

    en.wikipedia.org/wiki/Category:Statistical...

    Chernoff face. Chord diagram (information visualization) Choropleth map. Circular distribution. Contour boxplot. Control chart. Correlation diagram. Correlogram. Cumulative flow diagram.

  8. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    The Smith chart (sometimes also called Smith diagram, Mizuhashi chart (水橋チャート), Mizuhashi–Smith chart (水橋スミスチャート), Volpert–Smith chart (Диаграмма Вольперта—Смита) or Mizuhashi–Volpert–Smith chart), is a graphical calculator or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF ...

  9. Speed limits in the United States - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_in_the_United...

    In the United States, speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits can range from an urban low of 25 mph (40 km/h) to a rural high of 85 mph (137 km/h). Speed limits are typically posted in increments of five miles per hour (8 km/h).

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