I have always been skeptical of statistics. Maybe it's just fear of the unknownmy brain is demonstrably not wired for math. But everyone knows that statistics can be made to lie, and can be tweaked and manipulated and interpreted to mean nearly anything, to support or justify nearly any position or goal. I'm even more skeptical of statistical methods applied to measurements of what are arguably qualitative factors. So why should statistics about usability or user-experience design or HCI be any different? There has been plenty of discussion over recent years about how many users it takes to produce…
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