Interpreting Proportions in a Histogram

The histogram indicates that 30% of the area lies between $z=-1$ and $z=0$, suggesting that 60% lies to the right of $z=0$.

The total area from $z=0$ to $z=2$ is 50%, so the area between $z=+1$ and $z=+2$ must be 20%.

The area under the histogram between $z=+1$ and $z=+2$ is 10%, and 70% of the area lies to the left of $z=0$.

The area under the histogram between $z=+1$ and $z=+2$ is 30%, and 60% of the area lies to the left of $z=0$.