Normal distribution – Body and Tail Propotion

If a vertical line is drawn through a normal distributionat z= 0.50 separates the distribution into two sections, the body and the tail. What proportion of the distribution is in the body?

If a vertical line is drawn through a normal distribution at z= 0.50 separates the distribution into two sections, the body and the tail. What proportion is in the tail?

If a vertical line is drawn through a normal distribution at z= 1.20. What proportion of the distribution is on the left hand side of the tail?

1.
The body will have a proportion = 0.5 (-ve half the portion of the bell) …

This solution estimates the proportion of a normal distribution on two sides of a vertical line.