The Normal Curve and Z scores: Some Final Considerations
The term normal curve implies that this type of curve is normal.
- Mathematicians did once believe that this curve was ‘normal’ and that is how it got its name.
- We now know that this is a ‘chance’ distribution, not a normal distribution.
The normal curve extends from ± infinity as the line never actually touches the base line
±1 sd locates the deflection point for the normal curve. (line moves out more than down)