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  2. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    R 2 is a measure of the goodness of fit of a model. [11] In regression, the R 2 coefficient of determination is a statistical measure of how well the regression predictions approximate the real data points. An R 2 of 1 indicates that the regression predictions perfectly fit the data.

  3. Waste management - Wikipedia

    en.wikipedia.org/wiki/Waste_management

    Incineration is a disposal method in which solid organic wastes are subjected to combustion so as to convert them into residue and gaseous products. This method is useful for the disposal of both municipal solid waste and solid residue from wastewater treatment. This process reduces the volume of solid waste by 80 to 95 percent. [42]

  4. Sensor - Wikipedia

    en.wikipedia.org/wiki/Sensor

    The sensitivity is the slope of the transfer function. Converting the sensor's electrical output (for example V) to the measured units (for example K) requires dividing the electrical output by the slope (or multiplying by its reciprocal). In addition, an offset is frequently added or subtracted.

  5. Internet - Wikipedia

    en.wikipedia.org/wiki/Internet

    However, by 2018, Asia alone accounted for 51% of all Internet users, with 2.2 billion out of the 4.3 billion Internet users in the world. China's Internet users surpassed a major milestone in 2018, when the country's Internet regulatory authority, China Internet Network Information Centre, announced that China had 802 million users. [ 102 ]

  6. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    Microsoft released the first version of Excel for the Apple Macintosh on September 30, 1985, and then ported [37] it to Windows, with the first version being numbered 2.05 (to synchronize with the Macintosh version 2.2) and released in November 1987. Microsoft's Windows 3.x platforms of the early 1990s made it possible for their Excel ...

  7. Economic history of the United States - Wikipedia

    en.wikipedia.org/wiki/Economic_history_of_the...

    The national economy grew 1812–1815 at the rate of 3.7% a year, after accounting for inflation. Per capita GDP grew at 2.2% a year, after accounting for inflation. [134] Money that would have been spent on imports—mostly cloth—was diverted to opening new factories, which were profitable since British cloth was not available. [135]