Creating a normal probability plot

Plot a Normal (Q-Q) plot to subjectively assess the normality of a quantitative variable.

  1. Select a cell in the dataset.
  2. On the Analyse-it ribbon tab, in the Statistical Analyses group, click Distribution > Normal, and then click the plot type.
    The analysis task pane opens.
  3. In the Y drop-down list, select the variable.
  4. Optional: To label the points using the case label, if set, otherwise the observed value, select the Label points check box.
  5. Optional: To show the normal distribution and confidence band, select the Normal distribution line check box, and, if required, in the Confidence band edit box, type the level of confidence.
  6. Click Calculate.
Related reference