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  2. Relative change - Wikipedia

    en.wikipedia.org/wiki/Relative_change

    A percentage change is a way to express a change in a variable. It represents the relative change between the old value and the new one. [6]For example, if a house is worth $100,000 today and the year after its value goes up to $110,000, the percentage change of its value can be expressed as = = %.

  3. Entropy (information theory) - Wikipedia

    en.wikipedia.org/wiki/Entropy_(information_theory)

    The Shannon entropy is restricted to random variables taking discrete values. The corresponding formula for a continuous random variable with probability density function f(x) with finite or infinite support on the real line is defined by analogy, using the above form of the entropy as an expectation: [10]: 224

  4. Marginal product of labor - Wikipedia

    en.wikipedia.org/wiki/Marginal_product_of_labor

    The primary reason for the increase is specialization and division of labor. [6] At the point the AP L reaches its maximum value AP L equals the MP L. [7] Beyond this point the AP L falls. During the early stages of production MP L is greater than AP L. When the MP L is above the AP L the AP L will increase.

  5. Regression analysis - Wikipedia

    en.wikipedia.org/wiki/Regression_analysis

    Regression models predict a value of the Y variable given known values of the X variables. Prediction within the range of values in the dataset used for model-fitting is known informally as interpolation. Prediction outside this range of the data is known as extrapolation. Performing extrapolation relies strongly on the regression assumptions.

  6. Marginal distribution - Wikipedia

    en.wikipedia.org/wiki/Marginal_distribution

    It gives the probabilities of various values of the variables in the subset without reference to the values of the other variables. This contrasts with a conditional distribution, which gives the probabilities contingent upon the values of the other variables. Marginal variables are those variables in the subset of variables being retained.

  7. Exponential growth - Wikipedia

    en.wikipedia.org/wiki/Exponential_growth

    A quantity x depends exponentially on time t if = / where the constant a is the initial value of x, () =, the constant b is a positive growth factor, and τ is the time constant—the time required for x to increase by one factor of b: (+) = (+) / = / / = ().

  8. Variance inflation factor - Wikipedia

    en.wikipedia.org/wiki/Variance_inflation_factor

    Then, calculate the VIF factor for ^ with the following formula : = where R 2 i is the coefficient of determination of the regression equation in step one, with on the left hand side, and all other predictor variables (all the other X variables) on the right hand side.

  9. Effective interest rate - Wikipedia

    en.wikipedia.org/wiki/Effective_interest_rate

    6% compounded monthly is credited as 6%/12 = 0.005 every month. After one year, the initial capital is increased by the factor (1 + 0.005) 12 ≈ 1.0617. Note that the yield increases with the frequency of compounding. When the frequency of compounding is increased up to infinity (as for many processes in nature) the calculation simplifies to: