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  2. Dixon's Q test - Wikipedia

    en.wikipedia.org/wiki/Dixon's_Q_test

    McBane [1] notes: Dixon provided related tests intended to search for more than one outlier, but they are much less frequently used than the r 10 or Q version that is intended to eliminate a single outlier.

  3. List of bad luck signs - Wikipedia

    en.wikipedia.org/wiki/List_of_bad_luck_signs

    The number 17. Fear of the number 17 is known as heptadecaphobia and is prominent in Italian culture. [6] The number 39. Fear of the number 39 is known as the curse of 39, especially in Afghan culture. [7] The number 43. In Japanese culture, maternity wards numbered 43 are considered taboo, as the word for the number means "still birth". [8 ...

  4. 68–95–99.7 rule - Wikipedia

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

    One can compute more precisely, approximating the number of extreme moves of a given magnitude or greater by a Poisson distribution, but simply, if one has multiple 4 standard deviation moves in a sample of size 1,000, one has strong reason to consider these outliers or question the assumed normality of the distribution.

  5. Significance of numbers in Judaism - Wikipedia

    en.wikipedia.org/wiki/Significance_of_numbers_in...

    In the thought system of Maharal, each number has a consistent philosophical meaning: 1 - unity. 2 - dualism and multiplicity. 3 - the unity between two extremes. 4 - multiplicity in two directions, like the cardinal directions. 5 - the center point which unifies those four extremes. 6 - multiplicity in three dimensions. 7 - the center point ...

  6. Chinese numerology - Wikipedia

    en.wikipedia.org/wiki/Chinese_numerology

    The number 2 (二, cardinal, pinyin: èr or 兩, used with units, pinyin: liǎng) is most often considered a good number in Chinese culture. In Cantonese, 2 (二 or 兩, Cantonese Yale: yih or léuhng) is homophonous with the characters for "easy" (易, Cantonese Yale: yih) and "bright" (亮, Cantonese Yale: leuhng), respectively. There is a ...

  7. Median absolute deviation - Wikipedia

    en.wikipedia.org/wiki/Median_absolute_deviation

    Moreover, the MAD is a robust statistic, being more resilient to outliers in a data set than the standard deviation. In the standard deviation, the distances from the mean are squared, so large deviations are weighted more heavily, and thus outliers can heavily influence it. In the MAD, the deviations of a small number of outliers are irrelevant.

  8. Chauvenet's criterion - Wikipedia

    en.wikipedia.org/wiki/Chauvenet's_criterion

    The idea behind Chauvenet's criterion finds a probability band that reasonably contains all n samples of a data set, centred on the mean of a normal distribution.By doing this, any data point from the n samples that lies outside this probability band can be considered an outlier, removed from the data set, and a new mean and standard deviation based on the remaining values and new sample size ...

  9. List of small groups - Wikipedia

    en.wikipedia.org/wiki/List_of_small_groups

    Has the same number of elements of every order as Q 8 × Z 2. Nilpotent. 34 G 16 6: Z 8Z 2: Z 8 (2), Z 2 2 × Z 2, Z 4 (2), Z 2 2, Z 2 (3) Sometimes called the modular group of order 16, though this is misleading as abelian groups and Q 8 × Z 2 are also modular. Nilpotent. 35 G 16 7: D 16: Z 8, D 8 (2), Z 2 2 (4), Z 4, Z 2 (9) Dihedral ...