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Comparing Two Means

  • t-Test for Independent Samples
    • Most frequent test for determining the significance of the difference between means for two groups or between a sample and the known population means
    • Primarily used for independent samples (e.g., two different groups taking the same test)
  • t Test for correlated samples
    • Similar to the above except it is used for groups that are related to each other (e.g., pre and post tests for the same group of subjects)