Student's t-distribution, a Rare card

The card carries these facts from its Wikipedia article.

• Like the latter, it is symmetric around zero and bell-shaped.
• However, t ν has heavier tails, and the amount of probability mass in the tails is controlled by the parameter ν.
• For ν = 1 the Student's t distribution t ν becomes the standard Cauchy distribution, which has very "fat" tails, whereas for ν → ∞ it becomes the standard normal distribution N, which has very "thin" tails.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Student's t-distribution article was read about 270,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 77 and blocks with 70: each hit it takes is cut by 28 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Student's t-distribution in the power ranking, all domains together.