- Video Example: P(Z<-1)

Question: What proportion of the z distribution falls below a z score of -1?

  1. On a PC: from the menu select STATISTICS > Distribution Plot

    On a Mac: from the menu select Statistics > Probability Distributions > Distribution Plot

  2. Select Display Probability (Note: The default is the standard normal distribution)
  3. Select A specified X value
  4. Select Left tail
  5. For X value enter -1
Video Walkthrough

This video is available in both Windows and Mac platforms. Select your platform below.