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2. Light's associativity test - Wikipedia

   en.wikipedia.org/wiki/Light's_associativity_test

   Light's associativity test. In mathematics, Light's associativity test is a procedure invented by F. W. Light for testing whether a binary operation defined in a finite set by a Cayley multiplication table is associative. The naive procedure for verification of the associativity of a binary operation specified by a Cayley table, which compares ...

3. Cayley table - Wikipedia

   en.wikipedia.org/wiki/Cayley_table

   Cayley table. Named after the 19th century British mathematician Arthur Cayley, a Cayley table describes the structure of a finite group by arranging all the possible products of all the group's elements in a square table reminiscent of an addition or multiplication table. Many properties of a group – such as whether or not it is abelian ...

4. 68–95–99.7 rule - Wikipedia

   en.wikipedia.org/wiki/68–95–99.7_rule

   In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

5. Chi-squared test - Wikipedia

   en.wikipedia.org/wiki/Chi-squared_test

   A chi-squared test (also chi-square or χ2 test) is a statistical hypothesis test used in the analysis of contingency tables when the sample sizes are large. In simpler terms, this test is primarily used to examine whether two categorical variables ( two dimensions of the contingency table) are independent in influencing the test statistic ...

6. Divisibility rule - Wikipedia

   en.wikipedia.org/wiki/Divisibility_rule

   1,458: 1 + 4 + 5 + 8 = 18, so it is divisible by 3 and the last digit is even, hence the number is divisible by 6. Sum the ones digit, 4 times the 10s digit, 4 times the 100s digit, 4 times the 1000s digit, etc. If the result is divisible by 6, so is the original number. (Works because.

7. Three-cone drill - Wikipedia

   en.wikipedia.org/wiki/Three-cone_drill

   Three-cone drill. The three-cone drill, 3-cone drill or L-drill is a test performed by American football players. It is primarily run to evaluate the agility, quickness and fluidity of movement of players by scouts. It is most commonly seen at the NFL Combine in preparation for the NFL draft but is also an important measurement for collegiate ...