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  2. Software construction - Wikipedia

    en.wikipedia.org/wiki/Software_construction

    The following considerations apply to the software construction coding activity: [8] Techniques for creating understandable source code, including naming and source code layout. One study showed that the effort required to debug a program is minimized when the variables' names are between 10 and 16 characters. [9]

  3. Trace table - Wikipedia

    en.wikipedia.org/wiki/Trace_table

    The table usually takes the form of a multi-column, multi-row table; With each column showing a variable, and each row showing each number input into the algorithm and the subsequent values of the variables. Trace tables are typically used in schools and colleges when teaching students how to program.

  4. Propagation of uncertainty - Wikipedia

    en.wikipedia.org/wiki/Propagation_of_uncertainty

    Any non-linear differentiable function, (,), of two variables, and , can be expanded as + +. If we take the variance on both sides and use the formula [11] for the variance of a linear combination of variables ⁡ (+) = ⁡ + ⁡ + ⁡ (,), then we obtain | | + | | +, where is the standard deviation of the function , is the standard deviation of , is the standard deviation of and = is the ...

  5. Variance - Wikipedia

    en.wikipedia.org/wiki/Variance

    [6] [7] It is often made with the stronger condition that the variables are independent, but being uncorrelated suffices. So if all the variables have the same variance σ 2 , then, since division by n is a linear transformation, this formula immediately implies that the variance of their mean is

  6. Explained variation - Wikipedia

    en.wikipedia.org/wiki/Explained_variation

    In the words of one critic: "Thus gives the 'percentage of variance explained' by the regression, an expression that, for most social scientists, is of doubtful meaning but great rhetorical value. If this number is large, the regression gives a good fit, and there is little point in searching for additional variables.

  7. Effect size - Wikipedia

    en.wikipedia.org/wiki/Effect_size

    In statistics, an effect size is a value measuring the strength of the relationship between two variables in a population, or a sample-based estimate of that quantity. It can refer to the value of a statistic calculated from a sample of data, the value of one parameter for a hypothetical population, or to the equation that operationalizes how statistics or parameters lead to the effect size ...

  8. Software calculator - Wikipedia

    en.wikipedia.org/wiki/Software_calculator

    Love calculator: The input is two names, and there is a button to work out the compatibility, as a percentage, of two people with these names. Formula weight calculator : The input is a chemical molecular formula , using the periodic-table symbols and notation, and there is a button to work out the percentages of its constituents.

  9. FOCAL (programming language) - Wikipedia

    en.wikipedia.org/wiki/FOCAL_(programming_language)

    Nevertheless, the literal interpretation of the 1968 FOCAL manual suggests that the formula SET T=2-3+1 would be evaluated in the order 2-(3+1) and thus produce -2. This was very different than most languages, where the + and - had equal precedence and would be evaluated (2-3)+1 to produce 0. [ 26 ]