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WikiCards · Card list · Science cards · Ordinary least squares
Uncommon card · Science
Ordinary least squares, an Uncommon card
In statistics, ordinary least squares is a type of linear least squares method for choosing the unknown parameters in a linear regression model by the principle of least squares: minimizing the sum of the squares of the differences between the observed dependent variable in the input dataset and the output of the…
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 81
- DEF
- 65
- Power
- 146
- Wikipedia reads a year
- 150,000
Power 146 (ATK + DEF): stronger than 80 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Some sources consider OLS to be linear regression.
- Geometrically, this is seen as the sum of the squared distances, parallel to the axis of the dependent variable, between each data point in the set and the corresponding point on the regression surface, the smaller the differences, the better the model fits the data.
- The resulting estimator can be expressed by a simple formula, especially in the case of a simple linear regression, in which there is a single regressor on the right side of the regression equation.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ordinary least squares article was read about 150,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 81 and blocks with 65: each hit it takes is cut by 26 %.
How to get Ordinary least squares
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.
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Credits
Text : Wikipedia, Ordinary least squares (revision), CC BY-SA 4.0. Photo : Stpasha, Public domain, Wikimedia Commons.
