7.2.3.1 - Example: Proportion Between z -2 and +2

Question: What proportion of the z distribution is between -2 and 2?

Steps
  1. In Minitab select Graph > Probability Distribution Plot > One Curve > View Probability, hit OK.
  2. Select Normal and enter 0 for the mean and 1 for the standard deviation.(Note: The default is the standard normal distribution)
  3. Select Options
  4. Select A specified x value
  5. Select Middle and enter
    • X value 1: -2
    • X value 2: 2
  6. Select OK

The proportion of the z distributions that falls between -2 and 2 is 0.9545.