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  2. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    A pivot table is a table of values which are aggregations of groups of individual values from a more extensive table (such as from a database, spreadsheet, or business intelligence program) within one or more discrete categories. The aggregations or summaries of the groups of the individual terms might include sums, averages, counts, or other ...

  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. Record linkage - Wikipedia

    en.wikipedia.org/wiki/Record_linkage

    Record linkage (also known as data matching, data linkage, entity resolution, and many other terms) is the task of finding records in a data set that refer to the same entity across different data sources (e.g., data files, books, websites, and databases).

  5. Multiple comparisons problem - Wikipedia

    en.wikipedia.org/wiki/Multiple_comparisons_problem

    Although the 30 samples were all simulated under the null, one of the resulting p-values is small enough to produce a false rejection at the typical level 0.05 in the absence of correction. Multiple comparisons arise when a statistical analysis involves multiple simultaneous statistical tests, each of which has a potential to produce a "discovery".

  6. List of reduplicated place names - Wikipedia

    en.wikipedia.org/wiki/List_of_reduplicated_place...

    Ee, one of the Cook Islands; Est! Est!! Est!!! di Montefiascone, Italy, a wine region; Fakfak, West Papua, Indonesia; Fengfeng Mining District, Hebei, China; Gan Gan, Argentina; Gargar, Armenia: not an actual reduplication in Armenian, as the two ‘r’ sounds are different in this place name and are spelled using different letters.

  7. Double-barrelled name - Wikipedia

    en.wikipedia.org/wiki/Double-barrelled_name

    A double name can be formed when marrying or having children, combining the surnames of the parents. Double names can be combined by taking one part of each. Either spouse or both can take a double name. Based on a family's foreign name tradition, children can also get surnames based on a grandparent's surname. [21]

  8. Multiple discovery - Wikipedia

    en.wikipedia.org/wiki/Multiple_discovery

    Multiple discoveries in the history of science provide evidence for evolutionary models of science and technology, such as memetics (the study of self-replicating units of culture), evolutionary epistemology (which applies the concepts of biological evolution to study of the growth of human knowledge), and cultural selection theory (which studies sociological and cultural evolution in a ...