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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    This can be expanded for a case where one does not have the same percent change. If the initial amount p leads to a percent change x , and the second percent change is y , then the final amount is p (1 + 0.01 x )(1 + 0.01 y ) .

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    A mathematical or physical constant (e.g., π in the formula for the area of a circle with radius r as πr 2) has no effect on the determination of the significant figures in the result of a calculation with it if its known digits are equal to or more than the significant figures in the measured quantities used in the calculation.

  4. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    The same number, however, would be used if the last two digits were also measured precisely and found to equal 0 – seven significant figures. When a number is converted into normalized scientific notation, it is scaled down to a number between 1 and 10. All of the significant digits remain, but the placeholding zeroes are no longer required.

  5. e (mathematical constant) - Wikipedia

    en.wikipedia.org/wiki/E_(mathematical_constant)

    The number e is a mathematical constant approximately equal to 2.71828 that is the base of the natural logarithm and exponential function.It is sometimes called Euler's number, after the Swiss mathematician Leonhard Euler, though this can invite confusion with Euler numbers, or with Euler's constant, a different constant typically denoted .

  6. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    The ten digits of the Arabic numerals, in order of value. A numerical digit (often shortened to just digit) or numeral is a single symbol used alone (such as "1"), or in combinations (such as "15"), to represent numbers in positional notation, such as the common base 10.

  7. p-value - Wikipedia

    en.wikipedia.org/wiki/P-value

    If we consider every outcome that has equal or lower probability than "3 heads 3 tails" as "at least as extreme", then the p-value is exactly / However, suppose we have planned to simply flip the coin 6 times no matter what happens, then the second definition of p -value would mean that the p -value of "3 heads 3 tails" is exactly 1.

  8. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    When used at the end of a letter-case word (one that does not use all caps), the final form (ς) is used. In Ὀδυσσεύς (Odysseus), for example, the two lowercase sigmas (σ) in the center of the name are distinct from the word-final sigma (ς) at the end.

  9. Hexadecimal - Wikipedia

    en.wikipedia.org/wiki/Hexadecimal

    Hexadecimal (also known as base-16 or simply hex) is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 and "A"–"F" to represent values from ten to fifteen.