Graph Qualities

  1. Kurtosis – graphical measure of variability among scores
      a. Leptokurtic

      • Small range with a very peaked mode
      b. Platykurtic

      • Large range with a low mode
      c. Mesokurtic

      • Bell-shaped with gradual slopes

    2. Skew – graphical measure of extreme scores

      a. Negative

      • Extreme scores on the left;the mean is pulled downward
      b. Positive

      • Extreme scores on the right; the mean is pulled upward