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  2. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr or 3 σ, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean ...

  3. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    An increase of $0.15 on a price of $2.50 is an increase by a fraction of ⁠ 0.15 / 2.50 ⁠ = 0.06. Expressed as a percentage, this is a 6% increase. While many percentage values are between 0 and 100, there is no mathematical restriction and percentages may take on other values. [4]

  4. Guess 2/3 of the average - Wikipedia

    en.wikipedia.org/wiki/Guess_2/3_of_the_average

    Once these strategies are eliminated for every player, ⁠66 + 2 / 3 ⁠ becomes the new highest possible average (that is, if everyone chooses ⁠66 + 2 / 3 ⁠). Therefore, any guess above ⁠44 + 4 / 9 ⁠ is weakly dominated for every player since no player will guess above ⁠66 + 2 / 3 ⁠, and ⁠ 2 / 3 ⁠ of ⁠66 + 2 / 3 ⁠ is ⁠44 ...

  5. Irreducible fraction - Wikipedia

    en.wikipedia.org/wiki/Irreducible_fraction

    On the other hand, ⁠ 2 / 4 ⁠ is reducible since it is equal in value to ⁠ 1 / 2 ⁠, and the numerator of ⁠ 1 / 2 ⁠ is less than the numerator of ⁠ 2 / 4 ⁠. A fraction that is reducible can be reduced by dividing both the numerator and denominator by a common factor. It can be fully reduced to lowest terms if both are divided by ...

  6. List of U.S. states and territories by African-American ...

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    16.2% 30.7% 37.9% 50.5% 66.2% 73.2% 77.8% Florida: 5.2% 3.1% 2.3% 1.5% Georgia: 1.3% ...

  7. List of colleges and universities in the United States by ...

    en.wikipedia.org/wiki/List_of_colleges_and...

    In 2017, a federal endowment tax was enacted in the Tax Cuts and Jobs Act of 2017 in the form of an excise tax of 1.4% on institutions that have at least 500 tuition-paying students and net assets of at least $500,000 per student.

  8. Ratio - Wikipedia

    en.wikipedia.org/wiki/Ratio

    As for fractions, the simplest form is considered that in which the numbers in the ratio are the smallest possible integers. Thus, the ratio 40:60 is equivalent in meaning to the ratio 2:3, the latter being obtained from the former by dividing both quantities by 20. Mathematically, we write 40:60 = 2:3, or equivalently 40:60∷2:3.

  9. List of sovereign states by tax revenue to GDP ratio - Wikipedia

    en.wikipedia.org/wiki/List_of_sovereign_states...

    23 243.66: 12.85%: 2 986.23: 2019 ... Low & middle income economies (WB) 36 438.64: 10.70%: 3 899.25: 2022: Low-income economies (WB) 383.74: 10.14%: