Margin of error, an Uncommon card

The card carries these facts from its Wikipedia article.

• The larger the margin of error, the less confidence one should have that a poll result would reflect the result of a simultaneous census of the entire population.
• The margin of error will be positive whenever a population is incompletely sampled and the outcome measure has positive variance, which is to say, whenever the measure varies.
• The term margin of error is often used in non-survey contexts to indicate observational error in reporting measured quantities.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Margin of error article was read about 48,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 60 and blocks with 29: each hit it takes is cut by 12 %.

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The cards just above and just below Margin of error in the power ranking, all domains together.