Find the z-score that corresponds to each percentile.

1. P₁₀

2. P₂₀

3. P₉₉

a. Write the percentile as an area. If necessary, draw a graph of the area to visualize the problem.

b. Locate the area in the Standard Normal Table. If the area is not in the table, use the closest area. If the area is halfway between two area entries, use the z-score halfway between the corresponding z-scores.

c. Identify the z-score that corresponds to the area.