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WikiCards · Card list · History cards · Chi-squared test
Rare card · History
Chi-squared test, a Rare card
A chi-squared test is a statistical hypothesis test used in the analysis of contingency tables when the sample sizes are large.
- Rarity
- Rare
- Domain
- History
- ATK
- 67
- DEF
- 42
- Power
- 109
- Wikipedia reads a year
- 280,000
Power 109 (ATK + DEF): stronger than 65 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- In simpler terms, this test is primarily used to examine whether two categorical variables are independent in influencing the test statistic.
- The test is valid when the test statistic is chi-squared distributed under the null hypothesis, specifically Pearson's chi-squared test and variants thereof.
- Pearson's chi-squared test is used to determine whether there is a statistically significant difference between the expected frequencies and the observed frequencies in one or more categories of a contingency table.
Why it is Rare
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Chi-squared test article was read about 280,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 67 and blocks with 42: each hit it takes is cut by 17 %.
How to get Chi-squared test
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Credits
Text : Wikipedia, Chi-squared test (revision), CC BY-SA 4.0. Photo : Mikael Häggström, Public domain, Wikimedia Commons.
