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  2. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    Red population has mean 100 and SD 10; blue population has mean 100 and SD 50. A large standard deviation indicates that the data points can spread far from the mean and a small standard deviation indicates that they are clustered closely around the mean.

  3. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.

  4. Atlas Shrugged - Wikipedia

    en.wikipedia.org/wiki/Atlas_Shrugged

    Rand used interviews with scientist J. Robert Oppenheimer for the character Robert Stadler. Rand biographer Anne Heller traces some ideas that would go into Atlas Shrugged back to a never-written novel that Rand outlined when she was a student at Petrograd State University. The futuristic story featured an American heiress luring the most ...

  5. Racial inequality in the United States - Wikipedia

    en.wikipedia.org/wiki/Racial_inequality_in_the...

    Minorities are more likely than white Americans to not have a banking account. 3.5% of Asians, 3.3% of white Americans, 21.7% of African Americans and 19.3% of Hispanics and 15.6% of remaining racial/ethnic categories do not have banking accounts. [30] Lusardi's research revealed that education increases one's chances of having a banking account.

  6. Billion - Wikipedia

    en.wikipedia.org/wiki/Billion

    [1] [2] [3] 1,000,000,000,000 , i.e. one million million, or 10 12 (ten to the twelfth power), as defined on the long scale . This number is the historical sense of the word and remains the established sense of the word in other European languages.

  7. Value-added tax - Wikipedia

    en.wikipedia.org/wiki/Value-added_tax

    Note that the taxes paid by both the manufacturer and the retailer to the government are 10% of the values added by their respective business practices (e.g. the value added by the manufacturer is $1.20 minus $1.00, thus the tax payable by the manufacturer is ($1.20 – $1.00) × 10% = $0.02).

  8. Indonesian rupiah - Wikipedia

    en.wikipedia.org/wiki/Indonesian_rupiah

    The rupiah (symbol: Rp; currency code: IDR) is the official currency of Indonesia, issued and controlled by Bank Indonesia.Its name is derived from the Sanskrit word for silver, rupyakam (रूप्यकम्). [4]

  9. Half dollar (United States coin) - Wikipedia

    en.wikipedia.org/wiki/Half_dollar_(United_States...

    The half dollar, sometimes referred to as the half for short or 50-cent piece, is a United States coin worth 50 cents, or one half of a dollar.In both size and weight, it is the largest circulating coin currently minted in the United States, [1] being 1.205 inches (30.61 millimeters) in diameter and 0.085 in (2.16 mm) in thickness, and is twice the weight of the quarter.