Which of the following statements is true about the distribution of a normal variable? [I] Symmetric about the mean [II] Bell-shaped curve [III] Area under the curve is always one [IV] It is a continuous probability distribution [V] probability that x is equal to a specific value is zero.Please choose the most comprehensive answer.
Question 6 options:
1)
I,III,V
2)
II,III,IV,V
3)
III,IV,V
4)
All are true
5)
None is correct