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  2. p-chart - Wikipedia

    en.wikipedia.org/wiki/P-chart

    p-chart. In statistical quality control, the p-chart is a type of control chart used to monitor the proportion of nonconforming units in a sample, where the sample proportion nonconforming is defined as the ratio of the number of nonconforming units to the sample size, n. [1]

  3. U.S. economic performance by presidential party - Wikipedia

    en.wikipedia.org/wiki/U.S._economic_performance...

    Blinder and Watson estimated that the S&P 500 returned 8.4% annually on average under Democrats, versus 2.7% under Republicans, a difference of 5.7% percentage points. This computation used the average value in last year of the president's term, minus the average value in last year of previous term.

  4. History of the United States public debt - Wikipedia

    en.wikipedia.org/wiki/History_of_the_United...

    The history of the United States public debt began with federal government debt incurred during the American Revolutionary War by the first U.S treasurer, Michael Hillegas, after the country's formation in 1776. The United States has continuously experienced fluctuating public debt, except for about a year during 1835–1836.

  5. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    Stock A over the past 20 years had an average return of 10 percent, with a standard deviation of 20 percentage points (pp) and Stock B, over the same period, had average returns of 12 percent but a higher standard deviation of 30 pp. On the basis of risk and return, an investor may decide that Stock A is the safer choice, because Stock B's ...

  6. Price elasticity of demand - Wikipedia

    en.wikipedia.org/wiki/Price_elasticity_of_demand

    The price elasticity gives the percentage change in quantity demanded when there is a one percent increase in price, holding everything else constant. If the elasticity is −2, that means a one percent price rise leads to a two percent decline in quantity demanded. Other elasticities measure how the quantity demanded changes with other ...

  7. Instant-runoff voting - Wikipedia

    en.wikipedia.org/wiki/Instant-runoff_voting

    Instant-runoff voting ( IRV ), also known as plurality with elimination [1] or alternative vote ( AV) [2] in certain countries, is an ordinal voting system that modifies plurality voting to repeatedly eliminate the last-place finisher and reassigning their votes until only one candidate is left. [3] [4] In the United States, IRV is often ...

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