WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Variance
Rare card · Science
Variance, a Rare card
In probability theory and statistics, variance is a measure of dispersion, meaning it is a measure of how far a set of numbers are spread out from their average value.
- Rarity
- Rare
- Domain
- Science
- ATK
- 79
- DEF
- 64
- Power
- 143
- Wikipedia reads a year
- 430,000
Power 143 (ATK + DEF): stronger than 75 % of WikiCards cards.
Variance quiz: 3 questions
Three questions on the Variance card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The ______ deviation is the square root of the variance.
Answer
standard. The standard deviation is the square root of the variance. From the Variance article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Variance. Variance 79 · Charcoal 75 · Arctic exploration 72 · Hieronymus Bosch 69 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Variance. Variance 430,000 · Arctic exploration 24,000 · List of sweet potato cultivars 13,000 · Theta pinch 6,900 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- It is defined as the expected value of the squared deviation from the mean of a random variable.
- The standard deviation is the square root of the variance.
- Technically, it is the second central moment of a distribution, and the covariance of the random variable with itself, and it is often represented by σ 2 , s 2 , Var , V , or V .
Why it is Rare
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Variance article was read about 430,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 79 and blocks with 64: each hit it takes is cut by 26 %.
How to get Variance
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.
More Science cards
Cards close in power
The cards just above and just below Variance in the power ranking, all domains together.
- Bob MackieEpic · Arts · ATK 75 DEF 68
- Hieronymus BoschEpic · Arts · ATK 69 DEF 74
- Gholam-Hossein Mohseni-Eje'iRare · History · ATK 67 DEF 76
- MuscatRare · Society · ATK 77 DEF 66
- Stacey KingRare · Society · ATK 72 DEF 71
- Ahura MazdaRare · Arts · ATK 74 DEF 69
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Variance (revision), CC BY-SA 4.0. Photo : JRBrown, Public domain, Wikimedia Commons.
