https://www.sthda.com (C) 2005-2026 PHPBoost en PHPBoost https://www.sthda.com/english/articles/20-gallery/66-data-analytic-process-the-tidy-way/ https://www.sthda.com/english/articles/20-gallery/66-data-analytic-process-the-tidy-way/ tidy analysis, the data should be rectangular:

- Each variable forms a column.
- Each observation forms a row.
- Each type of observational unit forms a table.

The images below illustrate the data analytic process.


- Process as defined by Hadley Wickham’s book R for Data Science:




- Another example is in the book The Art of Data Science:





]]> Sat, 12 Aug 2017 01:28:00 +0200 https://www.sthda.com/english/articles/20-gallery/64-difference-between-type-i-and-type-ii-errors/ https://www.sthda.com/english/articles/20-gallery/64-difference-between-type-i-and-type-ii-errors/ type I and type II error in statistics.

- Type I: "I falsely think hypothesis is true" (one false)
- Type II: "I falsely think hypothesis is false" (two falses)




Source: https://effectsizefaq.com/2010/05/31/i-always-get-confused-about-type-i-and-ii-errors-can-you-show-me-something-to-help-me-remember-the-difference/]]> Fri, 11 Aug 2017 14:01:00 +0200