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The t-statistic - Coggle Diagram

- - - - Uses estimated standard error in the denominator
  - - - Shifts from standard deviation to variance for two reasons: 1. the sample variance is an unbiased statistic. 2. to maximize similarity from one version to another.
- - - - Wider interval= more confidence; narrower interval= less confidence
      - The larger the sample, the more narrow the interval.
- - - - Total of 10% found in two combined tails.
- - - - Bell shaped, symmetrical, and have a mean of 0.
      - Flatter and more spread out than pointed z-score distribution.
      - Different shape than z-score distribution as a result of the variance in bottom of t-score formula.