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  2. 68–95–99.7 rule - Wikipedia

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

    For an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set; while within two standard deviations account for about 95%; and within three standard deviations account for about 99.7%. Shown percentages are rounded theoretical probabilities intended only to approximate the empirical ...

  3. Distribution of wealth - Wikipedia

    en.wikipedia.org/wiki/Distribution_of_wealth

    A broader definition of wealth, which is rarely used in the measurement of wealth inequality, also includes human capital. For example, the United Nations definition of inclusive wealth is a monetary measure which includes the sum of natural, human and physical assets.

  4. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    When considering more extreme possible returns or outcomes in future, an investor should expect results of as much as 10 percent plus or minus 60 pp, or a range from 70 percent to −50 percent, which includes outcomes for three standard deviations from the average return (about 99.7 percent of probable returns).

  5. Ten percent plan - Wikipedia

    en.wikipedia.org/wiki/Ten_percent_plan

    A component of President Lincoln's plans for the postwar reconstruction of the South, this proclamation decreed that a state in rebellion against the U.S. federal government could be reintegrated into the Union when 10% of the 1860 vote count from that state had taken an oath of allegiance to the U.S. and pledged to abide by Emancipation. [1]

  6. Academic grading in India - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_India

    State boards may give either or both marks and grades; if grades are given, most grade students linearly (e.g.: A+ for >90, A for 80–90 and B for 65-80)As per board format(100-75-high achiever,40-75-average,10-40-below average and 0-10-fail)

  7. IC50 - Wikipedia

    en.wikipedia.org/wiki/IC50

    IC 50 values are typically expressed as molar concentration. IC 50 is commonly used as a measure of antagonist drug potency in pharmacological research. IC 50 is comparable to other measures of potency, such as EC 50 for excitatory drugs. EC 50 represents the dose or plasma concentration required for obtaining 50% of a maximum effect in vivo. [1]

  8. Less-than sign - Wikipedia

    en.wikipedia.org/wiki/Less-than_sign

    The less-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, <, has been found in documents dated as far back as the 1560s.

  9. Affluence in the United States - Wikipedia

    en.wikipedia.org/wiki/Affluence_in_the_United_States

    Affluence in the United States has been attributed in many cases to inherited wealth amounting to "a substantial head start": [8] [9] in September 2012, the Institute for Policy Studies found that over 60 percent of the Forbes richest 400 Americans had grown up in the top 5% of households. [10]