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2. Standard normal table - Wikipedia

   en.wikipedia.org/wiki/Standard_normal_table

   In statistics, a standard normal table, also called the unit normal table or Z table, [1] is a mathematical table for the values of Φ, the cumulative distribution function of the normal distribution.

3. Standard score - Wikipedia

   en.wikipedia.org/wiki/Standard_score

   Comparison of the various grading methods in a normal distribution, including: standard deviations, cumulative percentages, percentile equivalents, z-scores, T-scores. In statistics, the standard score is the number of standard deviations by which the value of a raw score (i.e., an observed value or data point) is above or below the mean value of what is being observed or measured.

4. Normal curve equivalent - Wikipedia

   en.wikipedia.org/wiki/Normal_curve_equivalent

   where z is the standard score or "z-score", i.e. z is how many standard deviations above the mean the raw score is (z is negative if the raw score is below the mean). The reason for the choice of the number 21.06 is to bring about the following result: If the scores are normally distributed (i.e. they follow the "bell-shaped curve") then

5. Normalization (statistics) - Wikipedia

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

   In the case of normalization of scores in educational assessment, there may be an intention to align distributions to a normal distribution. A different approach to normalization of probability distributions is quantile normalization , where the quantiles of the different measures are brought into alignment.

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8. Normal score - Wikipedia

   en.wikipedia.org/wiki/Normal_score

   The term normal score is used with two different meanings in statistics. One of them relates to creating a single value which can be treated as if it had arisen from a standard normal distribution (zero mean, unit variance). The second one relates to assigning alternative values to data points within a dataset, with the broad intention of ...

9. List of PDF software - Wikipedia

   en.wikipedia.org/wiki/List_of_PDF_software

   Printing system can render any document to a PDF file, thus any Linux program with print capability can produce PDF files Pdftk: GPLv2: No Yes Yes Command-line tools to merge, split, en-/decrypt, watermark/stamp and manipulate PDF document files. Front end to an older version of the iText library. poppler: GNU GPL: Yes Yes