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Q-statistic

From Wikipedia, the free encyclopedia

The Q-statistic or q-statistic is a test statistic:

  • The Box-Pierce test outputs a Q-statistic (uppercase) which follows the chi-squared distribution
    • The Ljung-Box test is a modified version of the Box-Pierce test which provides better small sample properties
  • The Tukey-Kramer test outputs a q-statistic (lowercase), also called the studentized range statistic, which follows the studentized range distribution