Question: What proportion of the z distribution falls below a z score of -1?
- In Minitab select Graph > Probability Distribution Plot > One Curve > View Probability, hit OK.
- Select Normal (Note: The default is the standard normal distribution)
- Select Options
- Select A specified x value
- Select Left Tail
- For X value enter -1
The proportion of the z distributions that falls below -1 is 0.1587.