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  2. Contingency table - Wikipedia

    en.wikipedia.org/wiki/Contingency_table

    The example above is the simplest kind of contingency table, a table in which each variable has only two levels; this is called a 2 × 2 contingency table. In principle, any number of rows and columns may be used. There may also be more than two variables, but higher order contingency tables are difficult to represent visually.

  3. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  4. Survey data collection - Wikipedia

    en.wikipedia.org/wiki/Survey_data_collection

    The survey, form, app or collection tool is on a mobile device such as a smart phone or a tablet. These devices offer innovative ways to gather data, and eliminate the laborious "data entry" (of paper form data into a computer), which delays data analysis and understanding.

  5. Questionnaire construction - Wikipedia

    en.wikipedia.org/wiki/Questionnaire_construction

    What is often referred to as "adequate questionnaire construction" is critical to the success of a survey. Inappropriate questions, incorrect ordering of questions, incorrect scaling, or a bad questionnaire format can make the survey results valueless, as they may not accurately reflect the views and opinions of the participants.

  6. Kish grid - Wikipedia

    en.wikipedia.org/wiki/Kish_grid

    This statistics -related article is a stub. You can help Wikipedia by expanding it.

  7. Microdata (statistics) - Wikipedia

    en.wikipedia.org/wiki/Microdata_(statistics)

    Survey/census results are most commonly published as aggregates (e.g. a regional-level employment rate), both for privacy reasons and because of the large quantities of data involved; microdata for one census can easily contain millions of records, each with several dozen data items.

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  9. Survey of Consumer Finances - Wikipedia

    en.wikipedia.org/wiki/Survey_of_Consumer_Finances

    The latest available results are those of the 2022 survey. [6] Two general types of data set are provided – first, the full public data set is given in DAP/SAS, Stata and ASCII computer formats; second, an extract file of summary variables is provided in Microsoft Excel spreadsheet format.